Faculty Profiles - MUTO, Shunsuke

Papers - MUTO, Shunsuke

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Magnetic measurements with atomic plane resolution Reviewed

J. Rusz, S. Muto, J. Spiegelberg, R. Adam, K. Tatsumi, D. E. Burgler, P. M. Oppeneer, C. M. Schneider

Nature Communications Vol. 7 page： 12672 2016.8

Quantitative characterisation of nanoscale polycrystalline magnets with electron magnetic circular dichroism Reviewed

Shunsuke Muto, Ján Rusz, Kazuyoshi Tatsumi, Roman Adam, Shigeo Arai, Vancho Kocevski, Peter M. Oppeneer, Daniel E. Bürgler & Claus M. Schneider

Nature Communications Vol. 5 ( 3138 ) page： 1-7 2014.1

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Electron magnetic circular dichroism (EMCD) allows the quantitative, element-selective determination of spin and orbital magnetic moments, similar to its well-established X-ray counterpart, X-ray magnetic circular dichroism (XMCD). As an advantage over XMCD, EMCD measurements are made using transmission electron microscopes, which are routinely operated at sub-nanometre resolution, thereby potentially allowing nanometre magnetic characterization. However, because of the low intensity of the EMCD signal, it has not yet
been possible to obtain quantitative information from EMCD signals at the nanoscale. Here we demonstrate a new approach to EMCD measurements that considerably enhances the outreach of the technique. The statistical analysis introduced here yields robust quantitative EMCD signals. Moreover, we demonstrate that quantitative magnetic information can be
routinely obtained using electron beams of only a few nanometres in diameter without imposing any restriction regarding the crystalline order of the specimen.

DOI： DOI: 10.1038/ncomms4138

Spin crossover and iron-rich silicate melt in the Earth's deeep mantle Reviewed

R.Nomura, H.Ozawa, S.Tateno, K.Hirose, J.Hernlund, S.Muto, H.Ishii and N.Hiraoka

NATURE Vol. 473 page： 199-202 2011.5

*Novel valence state of cerium in Ce2Zr2O7.5 elucidated by electron energy-loss spectroscopy under electron channeling conditions Reviewed

S. Arai, S. Muto, T. Sasaki, K. Tatsumi, Y. Ukyo, K. Kuroda and H. Saka

Solid State Communications Vol. 135 page： 664-667 2005

Language：English Publishing type：Research paper (scientific journal)

In the present study, we show, by electron energy loss spectroscopy (EELS) measurements under electron channeling conditions, the existence of a novel valence state for the cerium atoms in Ce2Zr2O7.5, where the valence state is split into two states, with the ions exhibiting a trivalent character (Ce3+) when facing oxygen planes with oxygen vacancies, and a tetravalent character (Ce4+) when facing oxygen planes with no oxygen vacancies. This result should prompt reconsideration of the conventional concept of the valence fluctuation in rare earth compounds.

*Local electronic structure analysis by site-selective ELNES using electron channeling and first-principles calculations Invited Reviewed

K. Tatsumi and S. Muto

J. Phys.: Condens. Matter Vol. 21 page： 104213 (14 pages) 2009

Site-specific electronic configurations of Fe 3d states by energy loss by channeled electrons Reviewed

K. Tatsumi, S. Muto, I. Nishida and J. Rusz

Applied Physics Letters Vol. 96 page： 201911 (3 pages) 2010.4

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Site-specific configurations of Fe 3d electrons in a spinel ferrite were investigated by electron energy loss spectroscopy (EELS) under electron channeling conditions. Site-specific spectra were extracted by applying a multivariate curve resolution (MCR) technique to the data set. An electronic difference in the Fe sites caused by ligand field splitting of trivalent Fe was probed. This demonstrated the promise of site-specific valence and spin state analysis in spintronics applications of spinel ferrites.

*Spectral restoration and energy resolution improvement of electron energy-loss spectra by Pixon reconstruction: I. Principle and test examples Reviewed

S. Muto, R. C. Puetter and K. Tatsumi

Journal of Electron Microscopy Vol. 55 page： 215-223 2006

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We applied Pixon deconvolution as introduced in Part I to several practical, examples of low signal-to-noise ratio (SNR), electron energy-loss spectra with a goal toward restoring their fine spectral features and/or improving the energy resolution. We demonstrate that by directly fitting the two-dimensional spectral data recorded on the CCD; the method enables us to reveal fine spectral structures. Consequently, Pixon reconstruction extends the ability to probe electronic states in very spatially localized areas, a capability currently unique to our method.

Mapping of heterogeneous chemical states of lithium in a LiNiO2-based active material by electron energy-loss spectroscopy Reviewed

S. Muto, K. Tatsumi, T. Sasaki, H. Kondo, T. Ohsuna, K. Horibuchi and Y. Takeuchi

Electrochemical Solid-State Letters Vol. 13 ( 8 ) page： A115-117 2010.5

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

It is difficult to analyze the local concentrations and chemical states of lithium in lithium-ion secondary battery electrodes by microanalysis techniques based on TEM because the core excitation spectra of transition metals invariably overlap with the absorption/emission spectra of Li-K. We propose a promising analysis method that enables the spatial distribution of lithium with different chemical states from the original phase in a LiNiO2-based positive electrode to be visualized. It employs a suite of spectrum imaging techniques including scanning transmission electron microscopy, electron energy-loss spectroscopy, and multivariate curve resolution. This method is successfully applied to a cross-sectioned positive electrode.

Detection of hydrogen at localized regions by unoccupied electronic states in iron carbides: towards high spatial resolution mapping of hydrogen distributions Reviewed

K. Tatsumi, S. Muto and T. Yoshida

Journal of Applied Physics Vol. 101 page： 023523-1-7 2007

Language：English Publishing type：Research paper (scientific journal)

In the present study, we examined the effects of hydrogen on electron energy-loss and x-ray absorption spectra of the iron carbides. The experimentally obtained spectral changes were interpreted on the basis of first principles
calculations for a model structure of the Fe–C–H system. Finally, we demonstrate high spatial resolution imaging of hydrogen distributions in iron-carbon systems by an energy-filtering transmission electron microscopy technique, utilizing the present spectral changes associated with
hydrogen incorporation.

電子エネルギー損失スペクトル微細構造解析の軽元素分析への応用 Invited Reviewed

武藤　俊介

顕微鏡 Vol. 41 ( 1 ) page： 26-31 2006.3

Local atomic and electronic structures around Mg and Al dopants in LiNiO2 electrodes studied by XANES and ELNES and first-principles calculations Reviewed

K. Tatsumi, Y. Sasano, S. Muto, T. Yoshida, T. Sasaki, K. Horibuchi, Y. Takeuchi and Y. Ukyo

Physical Review B Vol. 78 page： 045108(1-8) 2008.7

Language：English Publishing type：Research paper (scientific journal)

We investigated the local atomic and electronic structures around the dopants Mg and Al in a LiNiO2-based cathode material by the combination analysis of their K shell electron energy loss near edge structures (ELNES) and x-ray absorption near edge structures (XANES), and first-principles calculations. The occupation sites of the dopants in initial and cycled samples were examined. On the basis of the atomic structures and chemical bonding states of the models whose theoretical spectra were most consistent with the experimental spectra, we discussed the effects of Al and Mg on Li diffusion and their roles in suppressing the degradation of battery properties.

Hydrogen trapping state associated with the low temperature thermal desorption spectroscopy peak in hydrogenated nanostructured graphite Reviewed

Y. Miyabe, T. Yoshida, S. Muto, T. Kiyobayashi and H. Wasada

Journal of Applied Physics Vol. 104 page： 044311 2008.4

Quantitative determination of site occupancy of multi-rare-earth elements doped into Ca2SnO4 phosphor by electron channeling microanalysis Reviewed

Y. Fujimichi, S. Muto, K. Tatsumi, T. Kawano and H. Yamane

journal of Solid State Chemistry Vol. 183 page： 2127-2132 2010.8

Capacity fading mechanism of LiNiO2-based lithium ion batteries: II. Diagnostic analysis by electron microscopy and spectroscopy Reviewed

S. Muto, Y. Sasano, K. Tatsumi, T. Sasaki, K. Horibuchi, Y. Takeuchi and Y. Ukyo

J. Electrochem. Soc. Vol. 156 page： A371-A377 2009.4

Grazing-incidence electron microscopy of surface blisters in single- and polycrystalline tungsten formed by H+, D+ and He+ irradiation Reviewed

N. Enomoto, S. Muto, T. Tanabe, J. W. Davis and A. A. Haasz

J. Nucl. Mater. Vol. 385 page： 606-614 2009

A study on the relationship of magnetic moments orientation in L1₀ FePt network nanostructured film by electron energy-loss magnetic chiral dichroism using semi-core excitation spectra Reviewed International coauthorship

H. Makino, J. Rusz, J. Wang, D. Turenne, M. Ohtsuka, Y. K. Takahashi, H. A. Dürr, S. Muto

Journal of Magnetism and Magnetic Materials Vol. 558 page： 169522 2022.9

A study on the relationship of magnetic moments orientation in L1<sub>0</sub>FePt network nanostructured film by electron energy-loss magnetic chiral dichroism using semi-core excitation spectra Reviewed International coauthorship International journal

Makino, H; Rusz, J; Wang, J; Turenne, D; Ohtsuka, M; Takahashi, YK; Dürr, HA; Muto, S

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS Vol. 558 2022.9

Anode Properties of NaTi2(PO4)(3) Prepared by Adding Excess Na2CO3 for Aqueous Sodium-Ion Batteries

Kitajou Ayuko, Yamashita Maho, Kobayashi Wataru, Okada Masaki, Nanami Takuma, Muto Shunsuke

ACS APPLIED ENERGY MATERIALS Vol. 5 ( 8 ) page： 9587 - 9594 2022.8

Automating ALCHEMI at the nano-scale using software compatible with PC-controlled transmission electron microscopy

Ishizuka Akimitsu, Ohtsuka Masahiro, Muto Shunsuke

JOURNAL OF APPLIED CRYSTALLOGRAPHY Vol. 55 page： 551 - 557 2022.6

Binary dopant segregation enables hematite-based heterostructures for highly efficient solar H2O2 synthesis

Zhang Zhujun, Tsuchimochi Takashi, Ina Toshiaki, Kumabe Yoshitaka, Muto Shunsuke, Ohara Koji, Yamada Hiroki, Ten-no Seiichiro L., Tachikawa Takashi

NATURE COMMUNICATIONS Vol. 13 ( 1 ) 2022.3

STEM-EELS Spectrum Imaging of an Aerosol-Deposited NASICON-Type LATP Solid Electrolyte and LCO Cathode Interface

Muto Shunsuke, Yamamoto Yuta, Sakakura Miyuki, Tian Hong-Kang, Tateyama Yoshitaka, Iriyama Yasutoshi

ACS APPLIED ENERGY MATERIALS Vol. 5 ( 1 ) page： 98 - 107 2022.1

Structural and chemical modifications of oxides and OH generation by space weathering: Electron microscopic/spectroscopic study of hydrogen-ion-irradiated Al2O3

Igami Yohei, Muto Shunsuke, Takigawa Aki, Ohtsuka Masahiro, Miyake Akira, Suzuki Kohtaku, Yasuda Keisuke, Tsuchiyama Akira

GEOCHIMICA ET COSMOCHIMICA ACTA Vol. 315 page： 61 - 72 2021.12

Dynamics of Rh nanoparticle surface structure during NO reduction revealed by operando transmission electron microscopy

Tanaka Hiromochi, Orita Koji, Maede Atsushi, Ishikawa Hiroyuki, Miura Masahide, Arai Shigeo, Higuchi Tetsuo, Ohta Shigemasa, Muto Shunsuke

APPLIED CATALYSIS A-GENERAL Vol. 626 2021.9

2D-HARECXS analysis of dopant and oxygen vacancy sites in Al-doped yttrium titanate Reviewed

M. Ohtsuka, K. Oda, M. Tanaka, S. Kitaoka, S. Muto

Journal of the American Ceramic Society Vol. 104 ( 7 ) page： 3760 - 3769 2021.7

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis Reviewed

M. Ohtsuka, S. Muto

JoVE Journal ( 171 ) 2021.5

Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images (vol 67, pg 321, 2018) Reviewed

Yamamoto Yuta, Hattori Mizuki, Ohyama Junya, Satsuma Atsushi, Tanaka Nobuo, Muto Shunsuke

MICROSCOPY Vol. 68 ( 2 ) page： 194 - 194 2019.4

Control of surface potential and hydroxyapatite formation on TiO2 scales containing nitrogen-related defects Reviewed

Masami Hashimoto, Takafumi Ogawa, Satoshi Kitaoka, Shunsuke Muto, Maiko Furuya, Hiroyasu Kanetaka, Masayuki Abe, Hayato Yamashita

Acta Materialia Vol. 155 page： 379 - 385 2018.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Acta Materialia Inc

The hydroxyapatite (HAp) formation ability and related surface potentials of rutile-type TiO2 scales formed on Ti are controlled by varying the Ti heat treatment conditions in a N2 atmosphere containing a trace amount of O2. The zeta potentials of the samples heated at 873 and 973 K for 1 h are large negative and positive values, respectively, where HAp formation on the surface is enhanced in both cases. Upon longer heat treatment at those temperatures, the HAp forming ability diminishes and the zeta potential becomes more neutral. Kelvin probe force microscopy indicates that, under dry conditions, the surface charges on the TiO2 scales formed at 873 and 973 K in 1 h are positive and negative, respectively, opposite to the signs of the zeta potentials measured under wet conditions. Scanning transmission electron microscopy, electron energy loss spectroscopy, and calculations of defect formation energies reveal that nitrogen atoms incorporated into TiO2 during scale formation produce the charged defects (NO)O −1 and (N2)O +2 for the scales formed in 1 h at 873 and 973 K, respectively. In the case of longer treatments, nitrogen-related defects presumably transform into more stable states, such as N2 gas, in voids, resulting in a neutral surface. The present findings lead to physical models of surface charge distributions that elucidate the relationship between nitrogen-related defects, charged surfaces, and HAp formation mechanisms.

DOI： 10.1016/j.actamat.2018.05.072

Web of Science

Scopus

EPR Study of Porous Si:C and SiO2:C Layers

Dariya Savchenko, Andrii Vasin, Shunsuke Muto, Ekaterina Kalabukhova, Alexei Nazarov

Physica Status Solidi (B) Basic Research Vol. 255 ( 6 ) 2018.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Wiley-VCH Verlag

Initial porous silicon (por-Si), carbonized porous silicon (por-Si:C), and carbon-incorporated porous silicon oxide (por-SiO2:C) layers are studied by electron paramagnetic resonance (EPR) at T = 10–13 K. Scanning transmission electron microscopy and electron energy loss (EEL) spectroscopy show that por-Si:C and por-SiO2:C layers have a highly disordered structure with mixing sp2 and sp3 CC bonds. In the por-SiO2:C layers, the peak of the oxygen bonded to carbon in the form of hydroxyl groups is found in the EEL spectrum of the C K-edge region. Low-intensity signals of Lorentzian lineshape are detected in the EPR spectrum of por-Si, por-Si:C, por-SiO2:C layers. One of them is attributed to the Pb0 defect at the Si/SiO2 interface of nanocrystalline grain and the second to the silicon dangling bonds (SiDB) localized in nanocrystalline Si. The carbonization of por-Si layers and subsequent oxidation of por-Si:C gives rise to the appearance of additional EPR signals of high intensity at g = 2.0035(3) in por-Si:C and at g = 2.0030(3) in por-SiO2:C, which are assigned to carbon-related defects (CRD) and carbon clusters, correspondingly. It was found that predominant defect types in por-Si:C and por-SiO2:C layers are CRD and carbon clusters, respectively, while the spin concentration of Pb0 interface defects and SiDB is low.

DOI： 10.1002/pssb.201700559

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Scopus

Interfacial fracture strength evaluation of Cu/SiN micro-components: applicability of the linear fracture mechanics criterion under a hydrogen environment Reviewed

Yoshimasa Takahashi, Itaru Ashida, Shigeo Arai, Kimitaka Higuchi, Yuta Yamamoto, Shunsuke Muto

International Journal of Fracture Vol. 210 ( 1-2 ) page： 223 - 231 2018.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Springer Netherlands

The strength against fracture initiation from an interface free-edge of bonded copper (Cu) and silicon nitride (SiN) micro-components is studied. Quantitative fracture tests are conducted either in a vacuum environment or in a gaseous hydrogen (H2) environment. By using two kinds of specimens, Types I and II, having the same free-edge geometry (135∘/135∘) but different outer shape, the validity of the linear fracture mechanics criterion is critically evaluated. For specimens tested in vacuum, fracture initiation strength represented by the elastic stress intensity factor of the near-edge normal stress component is found to be the same irrespective of the specimen type, indicating that the fracture mechanics criterion holds. For specimens tested in H2 gas, the strength of both types is reduced and, interestingly, Type II strength shows greater reduction than Type I. In other words, the fracture mechanics criterion does not hold in H2 gas. Such a difference may be attributable to the difference of local plasticity in each specimen type.

DOI： 10.1007/s10704-018-0269-8

Web of Science

Scopus

Unmixing hyperspectral data by using signal subspace sampling

Jakob Spiegelberg, Shunsuke Muto, Masahiro Ohtsuka, Kristiaan Pelckmans, Jan Rusz

ULTRAMICROSCOPY Vol. 182 page： 205 - 211 2017.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

This paper demonstrates how Signal Subspace Sampling (SSS) is an effective pre-processing step for Non-negative Matrix Factorization (NMF) or Vertex Component Analysis (VCA). The approach allows to uniquely extract non-negative source signals which are orthogonal in at least one observation channel, respectively. It is thus well suited for processing hyperspectral images from X-ray microscopy, or other emission spectroscopies, into its non-negative source components. The key idea is to resample the given data so as to satisfy better the necessity and sufficiency conditions for the subsequent NMF or VCA. Results obtained both on an artificial simulation study as well as based on experimental data from electronmicroscopy are reported. (C) 2017 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ultramic.2017.07.009

Web of Science

High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis

Shunsuke Muto, Masahiro Ohtsuka

PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS Vol. 63 ( 2 ) page： 40 - 61 2017.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：PERGAMON-ELSEVIER SCIENCE LTD

Knowledge of the location and concentration of impurity atoms doped into a synthesized material is of great interest to investigate the effect of doping. This would usually be investigated using X-ray or neutron diffraction methods in combination with Rietveld analysis. However, this technique requires a large-scale facility such as a synchrotron radiation source and nuclear reactor, and can sometimes fail to produce the desired results, depending on the constituent elements and the crystallographic conditions that are being analysed. Thus, it would be preferable to use an element-selective spectroscopy technique that is applicable to any combination of elements. We have established a quantitative method to deduce the occupation sites and their occupancies, as well as the site-dependent chemical states of the doped elements, using a combination of transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, and electron energy-loss spectroscopy (EELS). The method is based on electron channelling phenomena where the symmetries of the Bloch waves excited in a crystal are dependent on the diffraction condition or incident beam direction with respect to the crystal axes. By rocking the incident electron beam with a fixed pivot point on the sample surface, a set of EDX/EELS spectra are obtained as a function of the beam direction. This is followed by a statistical treatment to extract the atom-site-dependent spectra, thereby quantitatively enabling the estimation of the site occupancies and chemical states of the dopants. This is an extension of the 'ALCHEMI' (Atom Location by Channelling Enhanced Microanalysis) method or 'HARECXS/HARECES' (High Angular Resolution Channelled X-ray/Electron Spectroscopy), and we further extended the method to be applicable to cases where the crystal of interest contains multiple inequivalent atomic sites for a particular element, applying the precise spectral predictions based on electron elastic/inelastic dynamical scattering theory. After introduction of conceptual aspects of the method, we describe the extension of the method together with the development of the theoretical calculation method. We then demonstrate several useful applications of the method, including luminescent, ferrite, and battery materials. We discuss the advantages and drawbacks of the present method, compared with those of the recently developed atomic column-by-column analysis using aberration-corrected scanning TEM and high-efficiency X-ray detectors. (C) 2017 Elsevier Ltd. All rights reserved

DOI： 10.1016/j.pcrysgrow.2017.02.001

Web of Science

Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution

Jan Rusz, Jakob Spiegelberg, Shunsuke Muto, Thomas Thersleff, Masahiro Ohtsuka, Klaus Leifer, Peter M. Oppeneer

PHYSICAL REVIEW B Vol. 95 ( 17 ) 2017.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC

Inelastic electron scattering is a consequence of mostly Coulomb interaction between electrons in the sample and electron beam and, as such, it is a nonlocal event. In atomic resolution experiments, it thus opens the following question: How far is the origin of the inelastic scattering signal that is observed when the electron beam is passing nearby an atomic column or plane? We analyze computationally the delocalization of the magnetic signal in electron magnetic circular dichroism (EMCD) experiments in the so-called three-beam orientation, allowing one to image individual atomic planes. We compare the classical EMCD setup using the double-difference procedure (DD-EMCD) to a recently introduced atomic plane resolution EMCD (APR-EMCD) geometry, assuming the same probe size. We observe a strong localization of the EMCD signal to the closest atomic plane, confirming the potential of EMCD to study an evolution of magnetic properties near surfaces or interfaces with atomic plane resolution. The localization of the EMCD signal is remarkably higher than the localization of the nonmagnetic component of the inelastic scattering cross section. We also analyze double-channeling effects and find them particularly strong for the DD-EMCD method, while for APR-EMCD they appear to be minor. The DD-EMCD signal, on the other hand, appears to be more robust with respect to sample thickness than that of the APR-EMCD.

DOI： 10.1103/PhysRevB.95.174412

Web of Science

Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface

Thomas Thersleff, Shunsuke Muto, Miroslaw Werwinski, Jakob Spiegelberg, Yaroslav Kvashnin, Bjorgvin Hjorvarsson, Olle Eriksson, Jan Rusz, Klaus Leifer

SCIENTIFIC REPORTS Vol. 7 2017.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：NATURE PUBLISHING GROUP

While the performance of magnetic tunnel junctions based on metal/oxide interfaces is determined by hybridization, charge transfer, and magnetic properties at the interface, there are currently only limited experimental techniques with sufficient spatial resolution to directly observe these effects simultaneously in real-space. In this letter, we demonstrate an experimental method based on Electron Magnetic Circular Dichroism (EMCD) that will allow researchers to simultaneously map magnetic transitions and valency in real-space over interfacial cross-sections with sub-nanometer spatial resolution. We apply this method to an Fe/MgO bilayer system, observing a significant enhancement in the orbital to spin moment ratio that is strongly localized to the interfacial region. Through the use of first-principles calculations, multivariate statistical analysis, and Electron Energy-Loss Spectroscopy (EELS), we explore the extent to which this enhancement can be attributed to emergent magnetism due to structural confinement at the interface. We conclude that this method has the potential to directly visualize spin and orbital moments at buried interfaces in magnetic systems with unprecedented spatial resolution.

DOI： 10.1038/srep44802

Web of Science

Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N-2

Hiroshi Inoue, Shunsuke Muto, Shigeo Arai, Hiroaki Wasada, Noritsugu Umehara

SURFACE & COATINGS TECHNOLOGY Vol. 313 page： 31 - 39 2017.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE SA

Carbon nitride (CN) coatings have been found to exhibit an ultra-low friction coefficient (less than 0.01) after repeated sliding against a silicon nitride (Si3N4) ball in a dry nitrogen gas (N-2) atmosphere. However, the mechanism for this has not yet been fully elucidated with respect to analyzing changes in the space structure of CNN. In the present study, we examined the microscopic structural changes in the near-surface structural transition layers of the wear track in the CN, coating and the transfer layer of the Si3N4 ball, using scanning transmission electron microscopy and electron energy-loss spectroscopy. We investigated the nitrogen concentration, density, and curvature of fragmented graphitic planes in the structural transition layers of both the CN,, coating and the transfer layer of the Si3N4 ball by analyzing the plasmon peak and carbon K-edge. In addition, we theoretically examined the chemical bonding states of nitrogen doping in various model clusters using an ab initio molecular orbital method to clarify the role of nitrogen in the ultra -low friction behavior. The mechanism behind the ultra low friction behavior is explained by nano-graphitization of the fragmented carbon structure with optimal nitrogen concentration passivating the contacting counter surfaces of the coating and ball formed during sliding. (C) 2017 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.surfcoat.2017.01.048

Web of Science

Detection of local chemical states of lithium and their spatial mapping by scanning transmission electron microscopy, electron energy-loss spectroscopy and hyperspectral image analysis Reviewed

Shunsuke Muto, Kazuyoshi Tatsumi

MICROSCOPY Vol. 66 ( 1 ) page： 39 - 49 2017.2

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：OXFORD UNIV PRESS

Advancements in the field of renewable energy resources have led to a growing demand for the analysis of light elements at the nanometer scale. Detection of lithium is one of the key issues to be resolved for providing guiding principles for the synthesis of cathode active materials, and degradation analysis after repeated use of those materials. We have reviewed the different techniques currently used for the characterization of light elements such as high-resolution transmission electron microscopy, scanning transmission electron microscopy ( STEM) and electron energy-loss spectroscopy (EELS). In the present study, we have introduced a methodology to detect lithium in solid materials, particularly for cathode active materials used in lithium-ion battery. The chemical states of lithium were isolated and analyzed from the overlapping multiple spectral profiles, using a suite of STEM, EELS and hyperspectral image analysis. The method was successfully applied in the chemical state analyses of hetero-phases near the surface and grain boundary regions of the active material particles formed by chemical reactions between the electrolyte and the active materials.

DOI： 10.1093/jmicro/dfw038

Web of Science

Dopant site occupancies and iron valence states in SrZn_xFe_18-xO₂₇ W-type hexaferrites using site-selective X-ray/electron spectroscopy Reviewed International journal

M. Ohtsuka, Y. Anan, S. Muto

Journal of Alloys and Compounds Vol. 1005 ( 176028 ) 2024.11

Cell structure development during cyclic deformation of near-[001] and near-[011] copper single crystals Reviewed International journal

B. Wang, H. Shi, T. Miyazawa, M. Ohtsuka, S. Muto, S. Arai, T. Fujii

Materials Science and Engineering: A ( 147357 ) 2024.10

Diamond/graphene (carbon sp³‑sp²) heterojunctions for neuromorphic device applications Reviewed International journal

H. Iwane, G. Saito, S. Muto, K. Ueda

Journal of Materials Research Vol. 39 ( 15 ) page： 2107 - 2114 2024.7

High-pressure synthesis, crystal structure and anisotropic thermal/ compressive behaviors of pseudo-ternary (V,Cr,Mo)P₄ Reviewed International journal

C.-C. Chang, T. Sasaki, S. Muto, N. A. Gaida, K. Niwa, M. Hasegawa

Journal of Solid State Chemistry Vol. 340 ( 125021 ) 2024.7

Development of an integrated high-voltage electron microscope–gas chromatograph–quadrupole mass spectrometer system for the operando analysis of catalytic gas reactions Reviewed International journal

L. Tang, T. Higuchi, S. Arai, H. Tanaka, S. Muto

Microscopy Vol. 73 ( 4 ) page： 358 - 366 2024.2

Cathode properties of controlled crystallinity nano-Li_1.2Cr_0.4Mn_0.4O₂ cathode for lithium ion batteries Reviewed International journal

A. Kitajou, S. Matsuda, K. Ohara, K. Ikeda, S. Muto

RSC Mechanochemistry 2024

Al-Zn-Mg合金の微細組織形成に及ぼす焼き入れ速度の影響 Reviewed International journal

愛須優輝, 一谷幸司, 田中宏樹, 齊藤元貴, 武藤俊介, 岡島敏浩

「軽金属」 Vol. 73 ( 12 ) page： 616 - 621 2023.12

Formation mechanism of dislocation network of cell structure in cyclically deformed near-[-1 1 1 ]copper single crystals Reviewed International journal

B. Wang, Y. Umeda, T. Miyazawa, M. Ohtsuka, S. Muto, S. Arai, T. Fujii

Materials Science & Engineering A Vol. 879 ( 145287 ) 2023.10

Stain-free mapping of polymer-blend morphologies via application of high-voltage STEM-EELS hyperspectral imaging to low-loss spectra Reviewed International journal

Umemoto Hiroki, Arai Shigeo, Otobe Hirohide, Muto Shunsuke

POLYMER JOURNAL Vol. 55 ( 9 ) page： 997 - 1006 2023.9

Cathode Properties of xLiF-LiCrO2 Composites (x=0-1.5) Prepared by Dry Ball-Milling Method for Lithium Ion Batteries Reviewed International journal

Kitajou Ayuko, Hiroi Satoshi, Ohara Koji, Ikeda Kazutaka, Nanami Takuma, Muto Shunsuke

JOURNAL OF PHYSICAL CHEMISTRY C Vol. 127 ( 6 ) page： 2866 - 2874 2023.2

Cathode properties of xLiF-LiCrO2 composites (x = 0-1.5) prepared by dry ball-milling method for lithium ion batteries Reviewed

A. Kitajou, S. Hiroi, K. Ohara, K. Ikeda, T. Nanami, S. Muto

J. Phys. Chem. C Vol. 127 page： 2866 - 2874 2023

Formation mechanism of dislocation network of cell structure in cyclically deformed near-[1¯11] copper single crystals Reviewed International coauthorship

B. Wang, Y. Umeda, T. Miyazawa, M. Ohtsuka, S. Muto, S. Arai, T. Fujii

Materials Science and Engineering: A Vol. 879 page： 145287 2023

Anode Properties of NaTi2(PO4)3 Prepared by Adding Excess Na2CO3 for Aqueous Sodium-Ion Batteries Reviewed

Ayuko Kitajou*Ayuko Kitajou Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Yamaguchi, Japan *Email: kitajou@yamaguchi-u.ac.jp More by Ayuko Kitajou Orcidhttps://orcid.org/0000-0002-7639-2990 , Maho Yamashita, Wataru Kobayashi, Masaki Okada, Takuma Nanami, and Shunsuke Muto

ACS Applied Energy Materials Vol. 5 ( 8 ) page： 9587 - 9594 2022.8

先端材料開発に向けた，AI先端計測技術の多角的視点からの考察(第1回) Reviewed

岡本和也, 杉山昌章, 武藤俊介, 青柳里果, 冨谷茂隆

日本金属学会会報「まてりあ」 Vol. 61 ( 8 ) page： 470 - 478 2022

低カウントのスペクトラムイメージ解析のための機械学習法 Reviewed

志賀元紀, 武藤俊介

顕微鏡 Vol. 57 ( 2 ) page： 65 - 69 2022

先端材料開発に向けた，AI先端計測技術の多角的視点からの考察(第2回) Reviewed

岡本和也, 杉山昌章, 武藤俊介, 青柳里果, 冨谷茂隆

日本金属学会会報「まてりあ」 Vol. 61 ( 9 ) page： 579 - 587 2022

Structural and chemical modifications of oxides and OH generation by space weathering: Electron microscopic/spectroscopic study of hydrogen-ion-irradiated Al2O3 Reviewed

Y. Igami, S. Muto, A. Takigawa, M. Ohtsuka, A. Miyake, K. Suzuki, K. Yasuda, A. Tsuchiyama

Geochimica et Cosmochimica Acta 2021.12

Dynamics of Rh Nanoparticle Surface Structure during NO Reduction Revealed by Operando Transmission Electron Microscopy Reviewed

H. Tanaka, K. Orita, A. Maede, H. Ishikawa, M. Miura, S. Arai, T. Higuchi, S. Ohta, S. Muto

Applied Catalysis A: General 2021.9

Preparation of silver-decorated Soluplus (R) nanoparticles and antibacterial activity towards S. epidermidis biofilms as characterized by STEM-CL spectroscopy Reviewed

Takahashi Chisato, Yamada Tomomi, Yagi Shinya, Murai Takaaki, Muto Shunsuke

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS Vol. 121 page： 111718 2021.2

次元削減法とそのスペクトル解析への応用 Reviewed

武藤俊介, 志賀元紀

日本鉄鋼協会「ふぇらむ」 Vol. 26 ( 7 ) page： 32-40 2021

Electron and Ion Transfer across Interfaces of the NASICON-Type LATP Solid Electrolyte with Electrodes in All-Solid-State Batteries: A Density Functional Theory Study via an Explicit Interface Model Reviewed International coauthorship International journal

Hong-Kang Tian, Randy Jalem, Bo Gao, Yuta Yamamoto, Shunsuke Muto, Miyuki Sakakura, Yasutoshi Iriyama, Yoshitaka Tateyama

ACS APPLIED MATERIALS & INTERFACES Vol. 12 ( 49 ) page： 54752 - 54762 2020.12

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER CHEMICAL SOC

NASICON-type oxide Li1+xAlxTi2-x(PO4)(3)(LATP) is expected to be a promising solid electrolyte (SE) for all-solid-state batteries (ASSBs) owing to its high ion conductivity and chemical stability. However, its interface properties with electrodes on the atomic scale remain unclear, but it is crucial for rational control of the ASSBs performance. Herein, we focused on the LATP SE with x = 0.17 and investigated the electron and ion transfer behaviors at the interfaces with the Li metal negative electrode and the LiCoO2 (LCO) positive electrode via explicit interface models and density functional theory calculations. Ti reduction was found at the LATP/Li interface. For the LATP/LCO interface, the results indicated the Li-ion transfer from LCO to LATP upon contact until a certain electric double layer is formed under equilibrium, in which LCO is partially reduced. Co-Ti exchange was also found to be favorable where the Li ion moves with Co3+ to LATP. We also explored the possible interfacial processes during annealing by simulating the oxygen removal effect and found that oxygen vacancy can be more easily formed in the LCO at the interface. It implies that partial Li ions move back to LCO for the local charge neutrality. We also demonstrated higher Li chemical potential around the LATP/LCO interfaces, leading to the dynamical Li-ion depletion upon charging. The calculation results and the deduced mechanisms well explain the experimental results so far and provide insights into the interfacial electron and ion transfer upon contact, during annealing, and charging.

DOI： 10.1021/acsami.0c16463

Web of Science

Core–Shell Double Doping of Zn and Ca on β-Ga 2 O 3 Photocatalysts for Remarkable Water Splitting Reviewed

Vol. 11 page： 1911 - 1919 2020.12

スペクトラムイメージデータのノイズ処理と信号抽出の最近の進展 Invited Reviewed

武藤俊介, 志賀元紀

顕微鏡 Vol. 55 ( 2 ) page： 60 - 64 2020.8

Application of machine learning techniques to electron microscopic/spectroscopic image data analysis Invited Reviewed

Muto Shunsuke, Shiga Motoki

MICROSCOPY Vol. 69 ( 2 ) page： 110 - 122 2020.4

Evolution from UV emission of phenyl groups to visible emission of pyrolytic nanocarbons dispersed in fumed silica: Alternative insight into photoluminescence of carbon nanodots

Vasin A. V, Muto S, Ishikawa Y, Kysil D. V, Sevostianov S. V, Isaieva O. F, Rudko G. Yu, Yatskiv R, Starik S, Tertykh V. A, Nazarov A. N, Lysenko V. S

JOURNAL OF LUMINESCENCE Vol. 219 page： 116926 - 116926 2020.3

Measurement of nanoscale local stress distribution in phase-separated glass using scanning transmission electron microscopy-cathodoluminescence

Yamada Taiki, Ohtsuka Masahiro, Takahashi Yoshimasa, Yoshino Haruhiko, Amma Shin-ichi, Muto Shunsuke

MATERIALIA Vol. 9 2020.3

Methods for Calibration of Specimen Temperature During In Situ Transmission Electron Microscopy Experiments

Gaulandris Fabrizio, Simonsen Soren B, Wagner Jakob B, Molhave Kristian, Muto Shun, Kuhn Luise T

MICROSCOPY AND MICROANALYSIS Vol. 26 ( 1 ) page： 3 - 17 2020.2

STEM-EELS analysis of the interface structures of composite ASS-LIB electrodes fabricated via aerosol deposition

Yamamoto Yuta, Iriyama Yasutoshi, Muto Shunsuke

JOURNAL OF THE AMERICAN CERAMIC SOCIETY Vol. 103 ( 2 ) page： 1454 - 1462 2020.2

Single-pass STEM-EMCD on a zone axis using a patterned aperture: progress in experimental and data treatment methods

Thersleff Thomas, Schonstrom Linus, Tai Cheuk-Wai, Adam Roman, Burgler, Daniel E, Schneider Claus M, Muto Shunsuke, Rusz Jan

SCIENTIFIC REPORTS Vol. 9 2019.12

Interfacial oxygen vacancies yielding long-lived holes in hematite mesocrystal-based photoanodes International journal

Zhang Zhujun, Karimata Izuru, Nagashima Hiroki, Muto Shunsuke, Ohara Koji, Sugimoto Kunihisa, Tachikawa Takashi

NATURE COMMUNICATIONS Vol. 10 ( 1 ) page： 4832 - 4832 2019.10

Language：Japanese Publishing type：Research paper (scientific journal)

Hematite (α-Fe2O3) is one of the most promising candidates as a photoanode materials for solar water splitting. Owing to the difficulty in suppressing the significant charge recombination, however, the photoelectrochemical (PEC) conversion efficiency of hematite is still far below the theoretical limit. Here we report thick hematite films (∼1500 nm) constructed by highly ordered and intimately attached hematite mesocrystals (MCs) for highly efficient PEC water oxidation. Due to the formation of abundant interfacial oxygen vacancies yielding a high carrier density of ∼1020 cm-3 and the resulting extremely large proportion of depletion regions with short depletion widths (<10 nm) in hierarchical structures, charge separation and collection efficiencies could be markedly improved. Moreover, it was found that long-lived charges are generated via excitation by shorter wavelength light (below ∼500 nm), thus enabling long-range hole transfer through the MC network to drive high efficiency of light-to-energy conversion under back illumination.

DOI： 10.1038/s41467-019-12581-z

Web of Science

PubMed

Non-negative Matrix Factorization and Its Extensions for Spectral Image Data Analysis

Shiga Motoki, Muto Shunsuke

E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY Vol. 17 page： 148 - 154 2019.9

Environmental high-voltage S/TEM combined with a quadrupole mass spectrometer for concurrent in situ structural characterization and detection of product gas molecules associated with chemical reactions Reviewed

S. Muto, S. Arai, T. Higuchi, K. Orita, S. Ohta, H. Tanaka, T. Suganuma, M. Ibe, H. Hirata

Microscopy Vol. 68 ( 2 ) page： 185 - 188 2019.4

Proposal for Measuring Magnetism with Patterned Apertures in a Transmission Electron Microscope Reviewed

S. Muto, S. Arai, T. Higuchi, K. Orita, S. Ohta, H. Tanaka, T. Suganuma, M. Ibe, H. Hirata

PHYSICAL REVIEW LETTERS Vol. 122 ( 3 ) page： 037201 2019.1

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC

We propose a magnetic measurement method utilizing a patterned postsample aperture in a transmission electron microscope. While utilizing electron magnetic circular dichroism, the method circumvents previous needs to shape the electron probe to an electron vortex beam or astigmatic beam. The method can be implemented in standard scanning transmission electron microscopes by replacing the spectrometer entrance aperture with a specially shaped aperture, hereafter called a ventilator aperture. The proposed setup is expected to work across the whole range of beam sizes-from wide parallel beams down to atomic resolution magnetic spectrum imaging.

DOI： 10.1103/PhysRevLett.122.037201

Web of Science

Analysis of evolution of electron-radiation-induced defects in white-luminescent, carbonized,mesoporous silica nanocomposite using transmission electron microscopy/cathodoluminescence Reviewed

K. Oguni, K. Sato, Y. Ishii, Y. Ishikawa, S. Kawasaki, A. Vasin, S. Muto

Nuclear Inst. And Methods in Physics Research B Vol. 439 page： 22 - 33 2019.1

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER

We examined the evolution of electron-radiation-induced defects in a white-luminescent, carbonized, mesoporous silica nanocomposite using cathodoluminescence (CL) and electron energy-loss spectroscopy associated with scanning transmission electron microscopy, in order to elucidate the microscopic origins of light emissions in the visible spectral range. The effects of electron irradiation on CL were analyzed based on the differential equations for kinetics of irradiation defects. The nanometric honeycomb silica framework was found to play essentially no role in the electron-excited light emission processes, in contrast to the case for photon-excited processes. The broad and continuous visible emission band in CL consisted of several luminescence components, that have been assigned to optically active point defects such as oxygen-deficient centers, and surface non-bridging oxygen hole centers (NBOHCs) in silica glass.

DOI： 10.1016/j.nimb.2018.11.007

Web of Science

Twinned/untwinned catalytic gold nanoparticles identified by applying a convolutional neural network to their Hough transformed Z-contrast images Reviewed

Y. Yamamoto, M. Hattori, J. Ohyama, A. Satsuma, N. Tanaka, S. Muto

Microscopy Vol. 67 ( 6 ) page： 321 - 330 2018.12

MC3T3-E1 Cellular Response and Protein Detection on Surface Potential-Controlled TiO2 Scale in Serum-Containing Medium Reviewed

M. Hashimoto, T. Ogawa, S. Kitaoka, S. Muto, M. Furuya, H. Kanetaka, M. Abe, H. Yamashita

Key Engineering Materials Vol. 782 page： 218-223 2018.10

Cation mixing in LiNi0.8Co0.15Al0.05O2 positive electrode material studied using high angular resolution electron channeling X-ray spectroscopy Reviewed

Yamamoto Yu, Ohtsuka Masahiro, Azuma Yosuke, Takahashi Teruo, Muto Shunsuke

JOURNAL OF POWER SOURCES Vol. 401 page： 263 - 270 2018.10

Progress in nanoinformatics and informational materials science Invited Reviewed

Seko Atsuto, Toyoura Kazuaki, Muto Shunsuke, Mizoguchi Teruyasu, Broderick Scott

MRS BULLETIN Vol. 43 ( 9 ) page： 690 - 695 2018.9

Evaluation of delamination strength of bonded micro-components: a nano-indenter technique combined with environmental microscopy

Takahashi Yoshimasa, Kishimoto Kaname, Higuchi Kimitaka, Yamamoto Yuta, Arai Shigeo, Muto Shunsuke

2018 INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE (MHS) page： . 2018

A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid

Chisato Takahashi, Shunsuke Muto, Hiromitsu Yamamoto

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS Vol. 105 ( 6 ) page： 1432 - 1437 2017.8

Language：English Publishing type：Research paper (scientific journal) Publisher：WILEY

In this study, we developed a scanning transmission electron microscopy (STEM) method for imaging the antibacterial activity of organic polymeric nanoparticles (NPs) toward biofilms formed by Staphylococcus epidermidis bacterial cells, for optimizing NPs to treat biofilm infections. The combination of sample preparation method using a hydrophilic ionic liquid (IL) and STEM observation using the cooling holder eliminates the need for specialized equipment and techniques for biological sample preparation. The annular dark-field STEM results indicated that the two types of biodegradable poly-(DL-lactide-co-glycolide) (PLGA) NPs: PLGA modified with chitosan (CS), and clarithromycin (CAM)loaded+CS-modified PLGA, prepared by emulsion solvent diffusion exhibited different antibacterial activities in nanoscale. To confirm damage to the sample during STEM obser-vation, we observed the PLGA NPs and the biofilm treated with PLGA NPs by both the conventional method and the newly developed method. The optimized method allows microstructure of the biofilm treated with PLGA NPs to be maintained for 25 min at a current flow of 40 pA. The developed simple sample preparation method would be helpful to understand the interaction of drugs with target materials. In addition, this technique could contribute to the visualization of other deformable composite materials at the nanoscale level. (C) 2016 Wiley Periodicals, Inc.

DOI： 10.1002/jbm.b.33680

Web of Science

Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface Reviewed

T. Thersleff, S. Muto, M. Werwinski, J. Spiegelberg, Y. Kvashnin, B. Hjorvarsson, O. Eriksson, J. Rusz, K. Leifer

SCIENTIFIC REPORTS Vol. 7 page： 44802 2017

Unmixing hyperspectral data by using signal subspace sampling Reviewed

J. Spiegelberg, S. Muto, M. Ohtsuka, K. Pelckmans, J. Rusz

Ultramicroscopy Vol. 182 page： 205-211 2017

Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N2 Reviewed

H. Inoue, S. Muto, S. Arai, H. Wasada, N. Umehara

Surface &Coating Technology Vol. 313 page： 31-39 2017

Control of HAp Formation and Osteoconductivity on Nitrogen-Doped TiO2 Scale Formed by Oxynitridation of Ti Reviewed

M. Hashimoto, S. Kitaoka, Y. Obata, S. Muto, T. Ogawa, M. Furuya, H. Kanetaka

Key Engineering Materials Vol. 758 page： 86-89 2017

High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis Reviewed

S. Muto, M. Ohtsuka

Progress in Crystal Growth and Characterization of Materials Vol. 63 page： 40-61 2017

Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution Reviewed

J. Rusz, J. Spiegelberg, S. Muto, T. Thersleff, M. Ohtsuka, K. Leifer, P. M. Oppeneer

PHYSICAL REVIEW B Vol. 95 page： 174412 2017

In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum-cation diffusion observations Reviewed

F. Gualandris, S. B. Simonsen, J. B. Wagner, S. Sanna, S. Muto, L. Theil Kuhn

ECS Transactions Vol. 75 page： 123-133 2017

In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum cation diffusion observations

Gualandris F., Simonsen S. B., Wagner J. B., Sanna S., Muto S., Kuhn L. Theil

SOLID STATE IONIC DEVICES 11 Vol. 75 ( 42 ) page： 123-133 2017

Unmixing hyperspectral data by using signal subspace sampling Reviewed

J. Spiegelberg, S. Muto, M. Ohtsuka, K. Pelckmans, J. Rusz

Ultramicroscopy Vol. 182 page： 205-211 2017

Towards sub-nanometer real-space observation of spin and orbital magnetism at the Fe/MgO interface Reviewed

T. Thersleff, S. Muto, M. Werwinski, J. Spiegelberg, Y. Kvashnin, B. Hjorvarsson, O. Eriksson, J. Rusz, K. Leifer

SCIENTIFIC REPORTS Vol. 7 page： 44802 2017

Microscopic origin of ultra-low friction coefficient between the wear track formed on carbon nitride coating and transfer layer on sliding ball in friction tests under dry N2 Reviewed

H. Inoue, S. Muto, S. Arai, H. Wasada, N. Umehara

Surface &Coating Technology Vol. 313 page： 31-39 2017

Localization of magnetic circular dichroic spectra in transmission electron microscopy experiments with atomic plane resolution Reviewed

J. Rusz, J. Spiegelberg, S. Muto, T. Thersleff, M. Ohtsuka, K. Leifer, P. M. Oppene

PHYSICAL REVIEW B Vol. 95 page： 174412 2017

In situ TEM analysis of a symmetric solid oxide cell in oxygen and vacuum-cation diffusion observations Reviewed

F. Gualandris, S. B. Simonsen, J. B. Wagner, S. Sanna, S. Muto, L. Theil Kuhn

ECS Transactions Vol. 75 page： 123-133 2017

High-precision quantitative atomic-site-analysis of functional dopants in crystalline materials by electron-channelling-enhanced microanalysis Reviewed

S. Muto, M. Ohtsuka

Progress in Crystal Growth and Characterization of Materials Vol. 63 page： 40-61 2017

Control of HAp Formation and Osteoconductivity on Nitrogen-Doped TiO2 Scale Formed by Oxynitridation of Ti Reviewed

M. Hashimoto, S. Kitaoka, Y. Obata, S. Muto, T. Ogawa, M. Furuya, H. Kanetaka

Key Engineering Materials Vol. 758 page： 86-89 2017

Sparse modeling of EELS and EDX spectral imaging data by nonnegative matrix factorization Reviewed

M. Shiga, K. Tatsumi, S. Muto, K. Tsuda, Y. Yamamoto, T. Mori, T. Tanji

Ultramicroscopy Vol. 170 page： 43-59 2016.8

Interfacial fracture strength of micro-scale Si/Cu components with different free-edge shape Reviewed

Y. Takahashi, H. Kondo, K. Aihara, M. Takuma, K. Saitoh, S. Arai, S. Muto, Y. Yamamoto, K. Higuchi, N. Tanaka

Key Engineering Materials Vol. 665 page： 169-172 2016

Structure analysis of topmost Layer of CNx after repeated sliding using scanning transmission electron microscopy electron energy-loss spectroscopy Reviewed

H. Inoue, S. Muto, X. Deng, S. Arai, N. Umehara

Thin Solid Films Vol. 616 page： 134-140 2016

A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid Reviewed

C. Takahashi, S. Muto, H. Yamamoto

Journal of Biomedical Materials Research Part B:Applied Biomaterials Vol. 500 2016

Quantitative analysis of cation mixing and local valence states in LiNixMn2-xO4 using concurrent HARECXS and HARECES measurements Reviewed

Y. Yamamoto, K. Kataoka, J. Akimoto, K. Tatsumi, T. Kousaka, J. Ohnishi, T. Takahashi, S. Muto

Microscopy Vol. 65 page： 253-262 2016

Multicomponent A-site ordered perovskite BiMn3(Fe0.25Ti0.75)4O12 : High-pressure synthesis, crystal Chemistry and magnetic behavior Reviewed

G. Shimura, K.Nowa, Y. Shirako, S. Muto, K. Kusaba, M. Hasegawa

Solid State Communications Vol. 234-235 page： 40-44 2016

The microstructure of scale formed by oxynitriding of Ti and exhibiting significant apatite-forming ability Reviewed

M. Hashimoto, S. Kitaoka, S. Muto, K. Kazuyoshi, Y. Obata

Journal of Materials Research Vol. 31 page： 1004-1011 2016

Union operation image processing of data cubes separately processed by different objective filters and its application to void analysis in an all-solid-state lithium-ion battery Reviewed

Y. Yamamoto, Y. Iriyama, S. Muto

Microscopy Vol. 65 page： 191-198 2016

Quantitative determination of occupation sites trace CO substituted for multiple Fe sites in M-type hexagonal ferrite using statistical beam-rocking TEM-EDXS analysis Reviewed

M.Ohtsuka, S. Muto, K. Tatsumi, Y. Kobayashi, T. Kawata

Microscopy Vol. 65 page： 127-137 2016

Evaluation of interfacial fracture strength in micro-components with different free-edge shape Reviewed

Y. Takahashi, K. Aihara, I. Ashida, K. Higuchi, Y. Yamamoto, S. Arai, S. Muto, N. Tanaka

Mechanical Engineering Journal Vol. 3 page： 1-10 2016

Matrix Factorization for Automatic Chemical Mapping from Electron Microscopic Spectral Imaging Datasets Reviewed

M. Shiga, S. Muto, K. Tatsumi, K. Tsuda

Transactions of the Materials Research Society of Japan Vol. 41 page： 333-336 2016

Change in Relative Density of Natural Rock Minerals Due to Electron Irradiation Reviewed

I. Maruyama, S. Muto

Journal of Advanced Concrete Technology Vol. 14 page： 706-716 2016

Effects of nitrogen-related defects on visible light photocatalytic response in N+ implanted TiO2: A first-principles study Reviewed

Junya Senga, Kazuyoshi Tatsumi, Shunsuke Muto, Tomoko Yoshida

Journal of Applied Physics Vol. 118 page： 115702-1-6 2015.9

Microscopic mechanism of path-dependence on charge-discharge history in lithium iron phosphate cathode analysis using scanning transmission electron microscopy and electron energy-loss spectroscopy spectral imaging Reviewed

Yoshitake Honda, Shunsuke Muto, Kazuyoshi Tatsumi, Hiroki Kondo, Kayo Horibuchi, Tetsuro Kobayashi, Tsuyoshi Sasaki

Journal of Power Sources Vol. 291 page： 85-94 2015.4

Evalution of Interfacial Fracture Strength in Micro-Scale Components Combined with High-Voltage Environmental Electron Microscopy Reviewed

Y. Takahashi, S. Arai, Y. Yamamoto, K. Higuchi, H. Kondo, Y. Kitagawa, S. Muto, N. Tanaka

Experimental Mechanics Vol. 55 page： 1047-1056 2015

High-pressure synthesis and Sn valence state analysis of BaTiO3-SnO solid solution Reviewed

Shoichiro Suzuki, Ken Niwa, Atsushi Honda, Shunsuke Muto, Akira Ando, Masashi Hasegawa

Journal of Materials Society Vol. 29 2014.12

Depth distribution of dopant effective for visible-light response in nitrogen-doped TiO2 photocatalyst Reviewed

T. Yoshida, E. Kuda, S. Muto

Surface and Interface Analysis 2014

Growth of rectangular hollow tube crystals with rutile-type structure in supercritical fluids Reviewed

K. Niwa, H. Ikegaya, T. Taguchi, S. Muto, T. Tokunaga and M. Hasegawa

J. Physics: Conf.Ser. Vol. 500 2014

Signal enhancement of electron magnetic circular dichroism by ultra-high-voltage TEM, toward quantitative nano-magnetism measurements Reviewed

K. Tatsumi, S. Muto, J. Rusz, T. Kudo, S. Arai

Microscopy Vol. 63 page： 243-247 2014

Discovery of the Last Remaining Binary Platinum-Group Pernitride RuN2 Reviewed

K. Niwa, K. Suzuki, S. Muto, K. Tatsumi, K. Soda, T. Kikegawa, M. Hasegawa

Chemistry - A European Journal Vol. 20 page： 1-5 2014

In Situ Transmission Electron Microscopy of Ionic Conductivity and Reaction Mechanisms in Ultrathin Solid Oxide Fuel Cells Reviewed

A. H. Tavabi, S. Arai, S. Muto, T. Tanji, R. E. Dunin-Borkowski

Microscopy and Microanalysis Vol. 20 page： 1817 2014

Development of an environmental high voltage electron microscope and its application to nano and bio-materials Reviewed

N. Tanaka, J. Usukura, M. Kusunoki, Y. Saito, K. Sasaki, T. Tanji, S. Muto, S. Arai

Journal of Physics: Conference Series Vol. 522 page： 12008 2014

Energy Loss by Channeled Electrons: A Quantitative Study on Transition Metal Oxides Reviewed

K.Tatsumi, S.Muto, and J.Rusz

Microscopy and Microanalysis page： 1-9 2013.8

Development of an environmental high-voltage electron microscope for reaction science Reviewed

N.Tanaka, J.Usukura, M.Kusunoki, Y.Saito, K.Sasaki, T.Tanji, S. Muto, S.Arai

Microscopy Vol. 62 page： 205-215 2013.3

New algorithm for efficient Bloch-waves calculations of orientation-sensitive ELNES Reviewed

J. Rusz, S. Muto, K. Tatsumi

Ultramicroscopy Vol. 125 page： 81-88 2013.2

Parameter-free extraction of EMCD from an energy-filtered diffraction datacube using multivariate curve resolution Reviewed

S. Muto, K. Tatsumi, J. Rusz

Ultramicroscopy Vol. 125 page： 89-96 2013.2

White light emission from amorphous silicon-oxycarbide materials Reviewed

Y. Ishikawa , K. Sato, S. Kawasaki, Y. Ishii, A. Matsumura and S. Muto

Physica Status Solidi A Vol. 209 ( 6 ) page： 1022-1025 2012.6

Effect of Mg-doping on the degradation of LiNiO2-based cathode materials by combined spectroscopic methods Reviewed

S. Muto, K. Tatsumi, Y. Kojima, H. Oka, H. Kondo, K. Horibuchi and Y. Ukyo

Journal of Power Sources Vol. 205 page： 449-455 2012.5

Chemical Bonding of AlH3 Hydride by Al-L2,3 Electron Energy-Loss Spectra and First-Principles Calculations Reviewed

K. Tatsumi, S. Muto, K. Ikeda and S. Orimo

Materials Vol. 5 page： 566-574 2012.3

電子顕微鏡分光と第一原理計算によるリチウム電池正極の機能元素電子状態解析 Reviewed

巽一厳、武藤俊介、近藤広規、佐々木厳、右京良雄

日本セラミックス協会「セラミックス」 Vol. 47 ( 7 ) page： 528-533 2012

最先端ナノ電子分光データの統計処理による物性画像診断 Invited Reviewed

武藤俊介

SCANS NEWS 2012-Ⅰ Vol. 35 page： 3-6 2012

Spin-filter tunnel junction with matched Fermi surfaces Reviewed

T. Harada, I. Ohkubo, M. Lippmaa, Y. Sakurai, Y. Matsumoto, S. Muto, H. Koinuma, and M. Oshima

Phys. Rev. Lett. Vol. 109 page： 076602-1-5 2012

Effect of Synthesis Process on Luminescence Properties and Structure of Mesoporous Carbon-Silica Nanocomposite Reviewed

K. Sato, Y. Ishikawa, Y. Ishii, S. Kawasaki, S. Muto and Y. Yamamoto

Jpn. J. Appl. Phys. Vol. 51 page： 082402-1-5 2012

STEM-EELS多変量解析を用いたLi化学状態マッピング Invited Reviewed

武藤俊介，巽一厳，近藤広規，堀渕嘉代，右京良雄介

顕微鏡 Vol. 47 page：印刷中 2012

多変量スペクトル解析によるナノ物性マッピング Invited Reviewed

武藤俊介

日本金属学会会報「まてりあ」 Vol. 51 ( 9 ) page： 415-422 2012

Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions Reviewed

T.Harada, I. Ohakubo, M.Lippmaa, Y.Sakurai, Y.Matsumoto, S. Muto, H.Koinuma, M.Oshima

ADVANCED FUNCTIONAL MATERIALS Vol. 21 page： 4471-4475 2012

反応科学超高圧電子顕微鏡の開発 Reviewed

田中信夫、臼倉治郎、楠美智子、斎藤弥八、佐々木勝寛、丹治敬義、武藤俊介、荒井重勇

顕微鏡 Vol. 46 page： 156-159 2011.9

Site occupancy determination of Eu/Y doped in Ca2SnO4 phosphor by electron channeling microanalysis Reviewed

S. Muto, Y. Fujimichi, K. Tatsumi, H. Yamane and T. Kawano

Optical Materials Vol. 33 page： 1015-1018 2011.5

各種信号処理・統計的手法の電子顕微鏡データへの応用-Application of Signal Processing and Statistical Processing to Electron Microscopic Datasets- Reviewed

武藤俊介

顕微鏡 Vol. 46 page： 24-29 2011.3

The growth of carbon coating layers on iron particles and the effect of alloying the iron with silicon Reviewed

H. Tokoro, S. Fujii, Y. Kobayashi and S. Muto

Journal of Alloys and Compounds Vol. 509 page： 1378-1383 2011.1

Comparative study of annealing and oxidation effects in a SiC:H and a-SiC thin films deposited by radio-frequency magnetron sputtering Reviewed

A.V. Vasin, S. Muto, Y. Ishikawa, A.V. Rusavsky, V.S. Lysenko and A.N.Nazarov

Thin Solid Films Vol. 519 page： 2218-2224 2011.1

Growth and structure of an ultrathin tin oxide film on Rh(111) Reviewed

J. Yuhara, D. Tajima, T. Matsui, K. Tatsumi, S. Muto, M. Schmid and P. Varga

J. Appl. Phys. Vol. 109 ( 2 ) page： 024903(5pages) 2011.1

Attribution of white-light emitting centers with carbonized surface in nano-structured SiO2:C layers Reviewed

A.V.vasin, S.Muto, Y.Ishikawa, J. Salonen, A.N.nazarov, V.S.Lysenko

Thin Solid Films Vol. 519 page： 4008-4011 2011.1

アルミニウム水素化物の合成および原子配置と水素放出特性 Reviewed

池田一貴，大友季哉，武藤俊介，折茂慎一

Ceramics Japan Vol. 46 page： 174-177 2011

放射光・電子分光法融合による触媒活性種の化学状態解析 Reviewed

吉田朋子、武藤俊介

触媒 Vol. 53 ( 4 ) page： 228-234 2011

Degradation analysis of a Ni-based layered positive-electrode active material cycled at elevated temperatures studied by scanning transmission electron microscopy and electron energy-loss spectroscopy Reviewed

Y.Kojima, S.Muto, K.Tatsumi, H.Kondo, H.Oka, K.Horibuchi and Y.Ukyo

Journal of Power Sources Vol. 196 page： 7721-7727 2011

The valence state and partitioning of iron in the Earth's lowermost mantle Reviewed

R. Sinmyo, K. Hirose, S. Muto, Y. Ohishi and A. Yasuhara

Jornal of Geophysical Research Vol. 116 page： B07205-1-9 2011

Microstructures and Reaction Mechanism of Aluminum Hydride Reviewed

S. Muto

Highlights of Collaborated Research Vol. 46 page： 47 2010.4

Comparison between Various Calculation Methods for Electronic Structure Investigations:Discussion of Chemical Bonding Based on Electron Energy-loss near Edge Structures Invited Reviewed

Shunsuke Muto and Kazuyoshi Tatsumi

Vol. 44 ( 3 ) page： 191-198 2009.10

Clustering of germanium atoms in silica glass responsible for the 3.1 eV emission band studied by optical absorption and X-ray absorption fine structure analysis Reviewed

T. Yoshida, S. Muto, L. Yuliati, H. Yoshida and Y. Inada

J. Nucl. Mater. Vol. 386-388 page： 1010-1013 2009.9

Thermoelectric properties of Ba3Co2O6(Co3)0.7 containing one-dimensional CoO6 octahedral columns Reviewed

K. Iwasaki, T. Yamamoto, H. Yamane, T. Takeda, S. Arai, H. Miyazaki, K. Tatsumi, M. Yoshino, T. Ito, Y. Arita, S. Muto, T. Nagasaki and T. Matsui

J. Appl. Phys. Vol. 106 ( 3 ) page： 034905(5pages) 2009.8

Dehydriding process of a-AlH3 observed by transmission electron microscopy and electron energy-loss spectroscopy Reviewed

S. Muto, K. Tatsumi, K. Ikeda and S. Orimo

Journal of Applied Physics Vol. 105 page： 123514 (4pages) 2009.6

複合電子分光による機能元素分析と物性画像診断 Invited Reviewed

武藤俊介，吉田朋子，巽一厳

日本金属学会会報「まてりあ」 Vol. 48 ( 6 ) page： 290-293 2009.6

*Diagnostic nano-analysis of materials properties by multivariate curve resolution applied to spectrum images by S/TEM-EELS Reviewed

S. Muto, T. Yoshida and K. Tatsumi

Materials Transactions Vol. 50 page： 964-969 2009.5

Local electronic and atomic structures of Ce3+-containing fluoride/oxide by TEM-EELS and first principles calculations Reviewed

I. Nishida, K. Tatsumi and S. Muto

Materials Transactions Vol. 50 ( 5 ) page： 952-958 2009.5

Capacity fading mechanism of LiNiO2-based lithium ion batteries: I. Analysis by electrochemical and spectroscopic examination Reviewed

T. Sasaki, T. Nonaka, H. Oka, C. Okuda, Y. Itou, Y. Kondo, Y. Takeuchi, Y. Ukyo, K. Tatsumi and S. Muto

J. Electrochem. Soc. Vol. 156 page： A289-A293 2009

Dehydriding reaction of AlH3: in-situ microscopic observations combined with thermal and surface analyses Reviewed

K. Ikeda, S. Muto, K. Tatsumi, M. Menjo, S. Kato, M. Bielmann, A. Zuttel, C. M. Jensen and S Orimo

Nanotechnology Vol. 20 page： 204004 (4 pages) 2009

Chemical state analysis of implanted nitrogen in visible-light response TiO2 photo-catalyst Invited Reviewed

T. Yoshida and S. Muto

Transaction of Materials Research Society Japan Vol. 33 ( 2 ) page： 339-344 2008

Color Control of White Photoluminescence from Carbon Incorporated Silicon Oxide Reviewed

Y. Ishikawa, A.V. Vasin, J. Salonen, S. Muto, V.S. Lysenko, A.N. Nazarov, N. Shibata, and V.-P. Lehto, J. Appl. Phys. 104 (2008) 083522.

J. Appl. Phys. Vol. 104 page： 083522 2008

Energy drifts correction of electron energy-loss spectra for prolonged data accumulation of low SNR signals Reviewed

Y. Sasano and S. Muto

Journal of Electron Microscopy Vol. 57 page： 149-158 2008

Site-selective electronic structure of aluminum in oxide ceramics obtained by TEM-EELS analysis using the electron standing-wave method Reviewed

Y. Yamamoto, K. Tatsumi and S. Muto

Materials Transaction Vol. 48 page： 2590-2594 2007.12

Depth-resolved EELS and chemical state mapping of N+-implanted TiO2 photocatalyst Reviewed

T. Yoshida, S. Muto and J. Wakabayashi

Materials Transaction Vol. 48 page： 2580-2584 2007.12

Measurement of Surface/Interface Electronic States by Position-Resolved Electron Energy-Loss Spectroscopy and Its Spatial Mapping on Nanometer Scale Invited

Vol. 45 ( 2 ) page： 27-38 2007.2

Nano-Order Structural Analysis of White Light-Emitting Silicon Oxide Prepared by Successive Thermal Carbonization/Oxidation of the Porous Silicon Reviewed

S. Muto, A. V. Vasin, Y. Ishikawa, N. Shibata, J. Salonen, and V-P. Lehto

Materials Science Forum Vol. 561-565 page： 1127-1130 2007

Site-by-site Electronic Structure Analysis of Al-containing Complex Compounds Using Channeling EELS and First Principles Calculations Reviewed

K. Tatsumi, Y Yamamoto and S. Muto

Materials Science Forum Vol. 561-565 page： 2091-2094 2007

Hydrogen Quasi-Chemically Trapped Between Defective Graphene Layers in Nanostructured Graphite Reviewed

Y. Miyabe, T. Yoshida, S, Muto and T. Kiyobayashi

Materials Science Forum Vol. 561-565 page： 1585-1588 2007

Depth selective electronic state analysis of implanted nitrogen in visible-light response TiO2 photocatalyst Reviewed

T. Yoshida, S. Muto and J. Wakabayashi

Materials Sciencd Forum Vol. 561-565 page： 567-570 2007

In situ observation of reversible oxygen absorption/release of ceria-zirconia solid solution with Pt particles by TEM and EELS Reviewed

S. Arai, S. Muto, T. Sasaki, Y. Ukyo, K. Kuroda, H. Saka

Electrochem. Solid-State Lett. Vol. 9 page： E1-E3 2006.4

Spectral restoration and energy resolution improvement of electron energy-loss spectra by Pixon reconstruction: I.Principle and test examples Reviewed

S. Muto, R. C. Puetter and K. Tatsumi

Journal of Electron Microscopy Vol. 54 ( 4 ) page： 215-223 2006.4

Fe-Co and Fe-Ni magnetic fine particles encapsulated by graphite carbon Reviewed

H. Tokoro, S. Fujii, S. Muto and S. Nasu

J. Appl. Phys. Vol. 99 page： 08Q512 2006.4

Intercalated hydrogen in nanostructured graphite studied by electron energy-loss spectroscopy and molecular orbital calculation Reviewed

T. Kimura, S. Muto, K. Tatsumi, T. Tanabe and T. Kiyobayashi

Journal of Alloys and Compounds Vol. 413 ( 1-2 ) page： 150-154 2006.3

Language：English Publishing type：Research paper (scientific journal)

Hydrogen loosely trapped between graphitic basal planes in hydrogenated nanostructured graphite was detected by the change in the relative intensity ratio of the π * and σ* peaks of the C K-edge in electron energy-loss spectroscopy (EELS). The experimental spectral change was explained by model calculations of intercalated hydrogen in graphitic sheets, using an ab initio molecular orbital (DV-X

Change in mechanical properties of ion-irradiated ceramics by nanoindentation method Reviewed

S. Nakano, S. Muto and T. Tanabe

Materials Transactions Vol. 47 ( 1 ) page： 112-121 2006.1

Language：English Publishing type：Research paper (scientific journal)

Changes in hardness of several representative ceramics and semiconductors associated with ion irradiation were systematically studied using a combination of nanoindentation and finite element analysis. We established a new method for obtaining the precise hardness of the embedded damaged layer of ion-irradiated samples. The method was applied to silicon carbide,

Site-specific electronic structure analysis by channeling EELS and first principles calculations Reviewed

K. Tatsumi, S. Muto, Y. Yamamoto, H. Ikeno, S. Yoshioka and I. Tanaka

Ultramicroscopy Vol. 106 page： 1019-1023 2006

Local Oxidation Induced by Inhomogeneous Stress on Blistered Si Surface Reviewed

S. Igarashi, A. N. Itakura, M. Kitajima, S. Nakano, S. Muto, T. Tanabe, H. Yamamoto and K. Hojou

Jpn. J. Appl. Phys. Vol. 45 page： 4179-4182 2006

Substructures of gas-ion-irradiation induced surface blisters in Si studied with cross-sectional transmission electron microscopy Reviewed

Vol. 46 ( 10 ) page： 2117-2124 2005.10

微小押し込み試験法によるセラミック材料のイオン照射に伴う力学特性変化 Reviewed

中野伸祐，武藤俊介，田辺哲朗

日本金属学会誌 Vol. 69 ( 9 ) page： 815-824 2005.9

非金属材料におけるヘリウム照射損傷について Invited Reviewed

武藤俊介

プラズマ・核融合学会誌 Vol. 81 ( 1 ) page： 41-45 2005.1

Structure of Oxygen-Related Defect Centers in of Ge1-xSix Alloys Studied by Extended Energy-Loss Fine Structure Analysis Reviewed

S. Muto, H. Sugiyama, I. Yonenaga and T. Tanabe

Japanese Journal of Applied Physics Vol. 44 page： 1892-1896 2005

Transmission electron microscopy and electron energy loss spectroscopy analysis of hydrogenated nanostructured graphite prepared by mechanical milling Reviewed

S. Muto, T. Kimuta, T. Kiyobayashi, T. Tanabe and T. Maruyama

Japanese Journal of Applied Physics Vol. 44 page： 2061-2068 2005

複合電子顕微分光への展望とその応用の可能性 Invited Reviewed

武藤俊介、巽一厳

日本セラミックス協会「セラミックス」 Vol. 11 page： 928-931 2005

TEM-EXELFS法の特徴とその応用の現状と展望 Invited Reviewed

武藤俊介

日本結晶学会誌 Vol. 471 page： 61-66 2005

Formation and in-situ dynamics of metallic nanoblisters in Ga+ implanted GaN nanowires Reviewed

A. Datta, S. Dhara, S. Muto, C. W. Hsu, C. T. Wu, C. H. Shen, T. Tanabe, T. Maruyama, K. H. Chen, L. C. Chen and Y. L. Wang

Nanotechnology Vol. 16 page： 2764-2769 2005

Atomistic structure and strain relaxation in Czochralski-grown SixGe1-x bulk alloys Reviewed

Vol. 16 page： 429-432 2005

Mechanism of nanoblister formation in Ga+ self-ion implanted GaN nanowires Reviewed

S. Dahra, A. Datta, S. Muto, C.T. Wu, K.H. Chen, Y. L. Wang, T. Tanabe, C.H. Shen, C.W.Hsu, L.C. Chen and T. Maruyama

Appllied Physics Letters Vol. 86 page： 203119-1-3 2005

Irradiation-induced hardening/softening in SiO2 studied with instrumented indentation Reviewed

S. Nakano, S. Muto and T. Tanabe

Materials Science and Engineering A Vol. 400-401 page： 382-385 2005

Maximum entropy spectral analysis of extended energy-loss fine structure and its application to time-resolved measurement Reviewed

S. Muto

Philosophical Magazine Vol. 84 page： 2793-2808 2004.9

EXELFS analysis of oxygen in Si-Ge alloys Reviewed

S. Muto, H. Sugiyama, I. Yonenaga and T. Tanabe

Proc. 8th Asia-Pacific Electron Microscopy Conference (APEM-8) page： 483-484 2004.6

Evidence of spatial valence fluctuation in Ce2Zr2O7.5 detected with electron channeling EELS: Janus state of Cerium Reviewed

S. Arai, S. Muto, T. Sasaki, Y. Ukyo, K. Kuroda and H. Saka

Proc. 8th Asia-Pacific Electron Microscopy Conference (APEM-8) page： 142-143 2004.6

FT-IR study on the effect of OH content on the damaging process in silica irradiated by hydrogen Reviewed

T. Yoshida, T. Tanabe, M. Hirano and S. Muto

Nuclear Instruments and Methods in Physics Research B Vol. 218 page： 202-208 2004.6

Characterization of nanodome on GaN nanowires formed with Ga Ion irradiation Reviewed

S. Muto, S. Dhara, A. Datta, C.-W. Hsu, C.-T. Wu, C.-H. Shen, L.-C. Chen, K.-H. Chen, Y.-L. Wang, T. Tanabe, T. Maruyama, H.-M. Lin and C.-C. Chen

Materials Transactions Vol. 45 ( 2 ) page： 435-439 2004.4

シリコン表面の水素イオン照射誘起ブリスターの非破壊構造解析と内部ガス圧評価 Reviewed

中野伸祐、榎本成晟、武藤俊介、田辺哲朗

日本金属学会会報「まてりあ」 Vol. 43 ( 12 ) page： 1008 2004.4

Synthesis of boron nitride nanolayers encapsulating iron fine particles and boron nitride nanotubes Reviewed

H. Tokoro, S. Fujii, T. Oku and S. Muto

Materials Research Society Symposium Proceedings Vol. 789 page： N3.34-39 2004

Valence Change of Cerium Ion associated with Redox reactions of Ceria-Zirconia Solid Solution by Electron Energy-Loss Spectroscopy Reviewed

S. Arai, S. Muto, J. Murai, T. Sasaki, Y. Ukyo, K. Kuroda and H. Saka

Mater.Trans. Vol. 45 page： 2951-2955 2004

TEM analysis of blisters on Si surface formed by hydrogen ion irradiation Reviewed

S. Muto, T. Tanabe and S. Igarashi

Physica Scripta Vol. T108 page： 19-22 2004

ブリスタリングによる応力変調を利用した局所シリコン酸化の観察 Reviewed

五十嵐慎一、板倉明子、北島正弘、中野伸祐、武藤俊介、田辺哲朗、山本博之、北條喜一

表面科学 Vol. 25 page： 562-567 2004

Crystal Structure of Ce2Zr2O7 and β-Ce2Zr2O7.5 Reviewed

T. Sasaki, Y. Ukyo, K. Kuroda, S. Arai, S. Muto and H. Saka

Journal of ceramics society of Japan Vol. 112 ( 8 ) page： 440-444 2004

電子エネルギー損失分光法によるセリア－ジルコニア固溶体の規則相の解析 Reviewed

荒井重勇、武藤俊介、村井盾哉、佐々木厳、右京良雄、黒田光太郎、坂公恭

日本金属学会誌 Vol. 68 ( 5 ) page： 264-268 2004

EXELFS/ELNES study of electron irradiation induced oxidation of α-SiC Reviewed

S. Muto, H. Sugiyama, T. Kimura, T. Tanabe and T. Maruyama

Vol. 218C page： 117-122 2004

Structure of an Oxygen-Related Defect Complex in SiC Studied with Electron Energy-Loss Spectroscopy Reviewed

S. Muto, H. Sugiyama, T. Kimura and T. Tanabe

Japanese Journal of Applied Physics Vol. 43 page： 1076-1080 2004

Reverse Monte Carlo analysis of extended energy-loss fine structure for disordered structures of tetrahedrally co-ordinated materials: its applicability Reviewed

S. Muto and T. Tanabe

Journal of Electron Microscopy Vol. 52 page： 125-132 2003

Local structures and damage processes of electron irradiated α-SiC studied with transmission electron microscopy and electron energy-loss spectroscopy Reviewed

S. Muto and T. Tanabe

Journal of Applied Physics Vol. 93 page： 3765-3775 2003

Cross sectional TEM observation of gas-ion-irradiation induced surface blisters and their precursors in SiC Reviewed

S. Muto, T. Tanabe and T. Maruyama

Materials Transactions Vol. 44 ( 12 ) page： 2599-2604 2003

Experimental and full multiple scattering approaches to energy-loss near-edge structures for c-Si, a-Si and a-Si:H Reviewed

K. Hayakawa, T. Fujikawa and S. Muto

Chemical Physics Letters Vol. 371 page： 498-503 2003

Damaging process of α-SiC under electron irradiation studied with electron microscopy and spectroscopy Reviewed

S. Muto, T. Tanabe, T. Shibayama, and H. Takahashi

Nuclear Instruments and Methods for Physics Research B Vol. 191 page： 519-523 2002

RHEED study of irradiation-induced surface damage processes in Si and α-Al2O3 Reviewed

S. Muto, J. Asami and T. Tanabe

Nuclear Instruments and Methods for Physics Research B Vol. 196 page： 324-332 2002

Development of new TEM specimen holder for cathodoluminescence detection Reviewed

T. Tanabe, S. Muto and S. Tohtake

Journal of Electron Microscopy Vol. 51 page： 311-313 2002

Surface Blistering of Ion Irradiated SiC studied by Grazing Incidence Electron Microscopy Reviewed

S. Igarashi, S. Muto T. Tanabe and T. Maruyama

Journal of Nuclear Materials Vol. 307-311 page： 1126-1129 2002

TEM and EELS characterization of carbon dust and co-deposited layers from the TEXTOR tokamak Reviewed

Journal of Nuclear Materials Vol. 307-311 page： 1289-1293 2002

In-situ Observation of Surface Blistering in Silicon by Deuterium and Helium Ion Irradiation Reviewed

S. Igarashi, S. Muto, T. Tanabe, J. Aihara and K. Hojou

Surface and Coatings Technology Vol. 158-159C page： 421-425 2002

Chemical effects of hydrogen on surface damaging process in gas-ion irradiated alumina Reviewed

J. Asami, S. Muto and T. Tanabe

Surface and Coatings Technology Vol. 158-159C page： 518-521 2002

透過電子エネルギー損失分光における内殻励起スペクトルを利用した軽元素材料の局所領域構造解析 Reviewed

武藤俊介、田辺哲朗

表面科学 Vol. 23 page： 381-388 2002

Formation of Si clusters in electron-irradiated SiC studied by electron energy-loss spectroscopy Reviewed

N. Asaoka, S. Muto and T. Tanabe

Diamond and Related Materials Vol. 10 page： 1247-1250 2001.4

低角度入射電子顕微鏡法による表面微小構造体の非破壊分析 Reviewed

五十嵐慎一、武藤俊介、田辺哲朗

日本金属学会誌「分析電子顕微鏡法による材料評価」 Vol. 65 ( 5 ) page： 423-426 2001

TEM-EXELFS法の効用：EXAFSとの対比 Invited

武藤俊介

電子顕微鏡 Vol. 36 ( 1 ) page： 65-67 2001

エネルギー損失広域微細構造による短距離構造相関の解析―二体分布から多体分布導出へ―

武藤俊介、田辺哲朗

日本金属学会誌「分析電子顕微鏡法による材料評価」 Vol. 65 ( 5 ) page： 332-337 2001

Detailed Structure Analysis of Deposit Layer in TEXTOR by Means of TEM Techniques Reviewed

S. Muto, N. Yokoya and T. Tanabe

Journal of Nuclear Materials Vol. 290-293 page： 295-298 2001

Non-Destructive Structural Analysis of Surface Blistering by TEM and EELS in a Reflection Configuration Reviewed

S. Muto, T. Matsui and T. Tanabe

Journal of Nuclear Materials Vol. 290-293 page： 131-134 2001

Energy-Filtered Image of Surface Blisters by Grazing Incidence Electron Microscopy Reviewed

S. Igarashi, S. Muto, T. Tanabe and T. Maruyama

Materials Transactions Vol. 42 ( 10 ) page： 2131-2132 2001

Observation of Surface Blistering by Grazing Incidence Electron Microscopy

S. Muto, T. Matsui and T. Tanabe

Japanese Journal of Applied Physics Vol. 39 ( 6A ) page： 3555-3556 2000.4

Application of spline wavelet transformation to the analysis of extended energy-loss fine structure Reviewed

S. Muto

Journal of Electron Microscopy Vol. 49 page： 525-529 2000.4

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We propose a new analysis method of the extended energy-loss fine structure (EXELFS), applying the multi-resolution analysis (MRA) in the wavelet transformation. We select the cardinal spline wavelet where the rank-4 cardinal spline function is used as a scaling function to construct the mother wavelet. In contrast with the conventional analysis method, the present method is efficient in filtering out the high-frequency noise and low-frequency components introduced by the numerical analysis process without distorting the original signal components, which promises quantitative analyses with less uncertainties.

Temperature effect of electron-irradiation-induced structural modification in graphite Reviewed

S. Muto and T. Tanabe

Journal of Nuclear Materials Vol. 283-287 page： 917-921 2000

TEM study on deuterium irradiation-induced defects in tungsten and molybdenum Reviewed

T. Matsui, S. Muto and T. Tanabe

Journal of Nuclear Materials Vol. 283-287 page： 1139-1143 2000

Wavelet analysis of extended energy-loss fine structure

S. Muto

Proceedings 12th European Congress on Electron Microscopy, EUREM-2000 Vol. 1 page： 321-322 2000

Extraction of three-body distribution in amorphous silicon by wavelet analysis of EXELFS

S. Muto, K. M. Yu, W. Walukiewicz, H-C. Jin and J. R. Abelson

Proceedings of 12th European Congress on Electron Microscopy, EUREM-2000 Vol. 1 page： 319-320 2000

Structural Change in Graphite under Electron Irradiation at Low Temperatures

Journal of Nuclear Materials Vol. 271&272 page： 280-284 1999.4

Local structures of Ga atoms in amorphous silicon and hydrogenated amorphous silicon before and after synchrotron X-ray irradiation

K. M. Yu, W. Walukiewicz, S. Muto, H.-G. Jin, J. R. Abelson, C. Clerc, C. J. Glover and M. C. Ridgway

Applied Physics Letters Vol. 75 ( 21 ) page： 3282-3284 1999.4

Fragmentation of graphite crystals by electron irradiation at elevated temperatures

S. Muto and T. Tanabe

Journal of Electron Microscopy Vol. 48 ( 5 ) page： 519-523 1999.4

Local structural order in electron-irradiated graphite studied by high-resolution high-voltage electron microscopy

S. Muto, S. Horibuchi and T. Tanabe

Journal of Electron Microscopy Vol. 48 ( 6 ) page： 767-776 1999.4

Change in Chemical Bonding States in Electron-Irrodiated Graphite(共著)

Japanese Journal of Applied Physics Part(]G0001[) Vol. 38 ( 3A ) page： 1514-1515 1999

TEM Analysis of Surface Ridge Network in an Ion-Irradiated Graphite Thin Film

S. Muto, T. Tanabe, M. Takeuchi, Y. Kobayashi, S. Furuno and K. Hojou

Journal of Nuclear Materials Vol. 271&272 page： 285-289 1999

Molecular Dynamics Study on Local Atomic Displacements Associated with Point Defects and Displacive Phase Transformations(共著)

Materials Transactions, JIM Vol. 40 ( 6 ) page： 514-521 1999

The effects of X-ray induced structural changes on the microstructure of a-Si after thermal crystallization

K. M. Yu, W. Walukiewicz, S. Muto, H-C. Jin and J. R. Abelson

Applied Physics Letters Vol. 75 ( 14 ) page： 2032-2034 1999

On EXELFS data analysis for obtaining reliable structural parameters

Y. Kobayashi, S. Muto, C. J. Echer and T. Tanabe

Journal of Electron Microscopy Vol. 48 ( 5 ) page： 525-529 1999

The Influence of X-ray Irradiation on Structural Relaxation and Crystallization of Amorphous Silicon films

S. Muto, Y. Kobayashi, K.-M. Yu, W. Walukiewicz, C.J. Echer, S. McCormick and J.R. Abelson

Japanese Journal of Applied Physics Vol. 37 ( 11 ) page： 5890-5893 1998.4

HREM-EELS Study of Structural Changes in Electron Irradiated Graphite (共著)

Proceedings of 14th International Congress on Electron Microscopy page： 119 1998

Lacal Atom Displacements Around Crystal Lattice Defects Inducing Phase Transformation Studies by Molecular Dynamics Simulation (共著)

Proceedings of Pacific Rim International Conference on Advanced Materials and Processing page： 1461 1998

Spatial and Structural Modification in Graphite by High-Energy Electron Irradiation (共著)

Proceedings of 5-th NIRIM International Symposium on Advanced Materials page： 129 1998

TEM-EELS法による黒鉛の電子照射誘起構造変化 Invited Reviewed

まてりあ Vol. 37 ( 10 ) page： 873-879 1998

A New Microscopic Model of Electron Irradiation Damage in Graphite

S. Muto, M. Takeuchi and T. Tanabe

Journal of Surface Analysis Vol. 3 ( 2 ) page： 420-425 1997.4

Damage Process in Electron-Irradiated Graphite Studied by Transmission Electron Microscopy. II. Analysis of Extended Energy-Loss Fine Structure of Highyly Oriented Pyrolytic Graphite

M. Takeuchi, S. Muto, T. Tanabe, S. Arai and T. Kuroyanagi

Philosophical Magazine A Vol. 76 ( 3 ) page： 691-700 1997.4

Damage Process in Electron-Irradiated Graphite by Transmission Electron Microscopy. I. High Resolution Observation of Highly Graphitized Carbon Fibre

S. Muto and T. Tanabe

Philosophical Magazine A Vol. 76 ( 3 ) page： 679-690 1997.4

計算材料設計システムMASPHYCによる分子動力学シミュレーション(共著)

名古屋大学大型計算機センターニュース Vol. 27 ( 4 ) page： 305 1996

New Stable Structure on the (001) Plane in Germanium Formed by Deutron Irradiation(共著)

Philosophical Magazine Letters Vol. 72 ( 2 ) page： 99 1995

Extended Defect Formation in Silicon and Germanium Induced by Light Gas Ion Irradiation Studied with Transmission Electron Microscopy(共著)

Materials Science Forum Vol. 196-201 page： 1171 1995

Structure of Hydrogen Induced Platelet Studied by Transmission Electron Microscopy

Philosophical Magazine A Vol. 72 ( 4 ) page： 1057 1995

A New Type of Extended Defect on the (100) Plane in Germanium Produced by Deuteron Bombardment (共著)

Proceedings of International Congress on Electron Microscopy Vol. II page： 565 1994

Structural Study of Hydrogen Induced Platelet in Si and Ge by Transmission Electron Microscopy (共著)

Materials Science Forum Vol. 143-147 page： 897 1994

Study on Lattice Displacements Associated With ω-Transformations with Transmission Electron Microscopy

Electron Microscopy Vol. 29 ( 1 ) page： 2 1994

In-situ HREM Observation of Electron-Irradiation-Induced Martensitic Transformation in a N₆₃Al₃₇ Alloy (共著)

Journal of Alloys and Compounds Vol. 199 page： 1 1993

High Resolution Electron Microscopy of Structural Defects in Crystalline C₆₀ and C₇₀ (共著)

Philosophical Magazine B Vol. 67 ( 4 ) page： 443 1993

High-Resolution Electron Microscopy and Electron Diffraction Study of the Displacive Transformation of the Ni₂Al Phase in Ni₆₅Al₃₅ Alloy and Associated Martensitic Transformation (共著)

Acta Metallurgica et Materialia Vol. 41 ( 8 ) page： 2377 1993

Displacive-Replacive Phase Transformation in a N_62.5Al_37.5-β₂ Phase by Transmission Electron Microscopy and Diffraction (共著)

Philosophical Magazine B Vol. 67 ( 5 ) page： 673 1993

Structures and Phase Transitions in C₆₀ and C₇₀ Fullerites (共著)

Ultramicroscopy Vol. 51 page： 168 1993

Displacive and Diffusive Components in the Formation of the Ni₂Al Structure Studied by HREM, SAED and Micro-ED

Proceedings of International Conference on Martensitic Trausformations, ICOMAT-92 page： 101 1993

Structure of Si Aggregates in Heavily Si-Doped GaAs (共著)

Philosophical Magazine A Vol. 66 ( 2 ) page： 257 1992

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