Faculty Profiles - YAMAMOTO Eisuke

Papers - YAMAMOTO Eisuke

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Surfactant Templating for the Subnanometer Thickness Engineering of Free-Standing Nonlayered Nanosheets Reviewed International coauthorship

Eisuke Yamamoto, Yuma Takezaki, Renjiro Hara, Makoto Kobayashi, Ruben Canton Vitoria, Zixiao Shi, David A. Muller, Thomas E. Mallouk, Minoru Osada

ACS Nano 2025.11

Molecularly Thin Nanosheet Films as Water Dissociation Reaction Catalysts Enhanced by Strong Electric Fields in Bipolar Membranes Reviewed

Eisuke Yamamoto, Tianyue Gao, Langqiu Xiao, Kelly Kopera, Sariah Marth, Heemin Park, Chulsung Bae, Minoru Osada, Thomas E. Mallouk

Journal of the American Chemical Society 2025.4

Bipolar Membranes With Controlled, Microscale 3D Junctions Enhance the Rates of Water Dissociation and Formation Reviewed

Tianyue Gao, Leanna Schulte, Langqiu Xiao, Eisuke Yamamoto, Amy S. Metlay, Colton J. Sheehan, Sariah Marth, Heemin Park, Sayantan Sasmal, Francisco J. Galang, Chulsung Bae, Adam Z. Weber, Shannon W. Boettcher, Thomas E. Mallouk

Advanced Energy Materials 2024.11

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

Abstract

A soft lithographic method is developed for making bipolar membranes (BPMs) with catalytic junctions formed from arrays of vertically oriented microscale cylinders. The membranes are cast from reusable polydimethylsiloxane (PDMS) molds made from silicon masters, which are fabricated on 2″ to 4″ wafer scales by nanosphere lithography. High‐aspect‐ratio junctions are made on a length scale similar to the thickness of optimized catalyst layers for water dissociation, creating a platform for probing the dual effects of catalysis and local electric field at the microscale BPM junction. Optimized polymer materials and nanoscale metal oxide catalysts are used in this study. 3D BPMs are tested under reverse and forward bias conditions, exhibiting superior performance relative to their 2D counterparts. Under forward bias in H2‐O2 fuel cells, 3D BPMs achieve a current density of 1500 mA cm−2, ≈7 times higher than 2D membranes made from the same materials.

DOI： 10.1002/aenm.202404285

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Solid-state surfactant templating for controlled synthesis of amorphous 2D oxide/oxyhydroxide nanosheets Reviewed Open Access

Eisuke Yamamoto, Daiki Kurimoto, Kentaro Ito, Kohei Hayashi, Makoto Kobayashi, Minoru Osada

Nature Communications Vol. 15 page： 6612 2024.8

界面活性剤を用いた非層状系ナノシート合成の新展開

山本瑛祐, 長田実

Ceramics Japan = セラミックス : bulletin of the Ceramic Society of Japan Vol. 58 ( 7 ) page： 441 - 444 2023.7

Free-Standing Molecularly Thin Amorphous Silica Nanosheets Reviewed Open Access

Eisuke Yamamoto, Kosuke Fujihara, Yuma Takezaki, Kentaro Ito, Yue Shi, Makoto Kobayashi, Minoru Osada

Small page： 2300022 2023.2

Tailored synthesis of molecularly thin platinum nanosheets using designed 2D surfactant solids Reviewed

Eisuke Yamamoto, Akiko Suzuki, Makoto Kobayashi, Minoru Osada

Nanoscale Vol. 14 page： 11561 - 11567 2022.6

Formation of Closed Pores in Mesoporous Silica Nanoparticles by Hydrothermal Treatment Reviewed

E. Yamamoto, C. Lulu, T. Watanabe, S. Mori, H. Wada, A. Shimojima, K. Kuroda

Bulletin of the Chemical Society of Japan Vol. just accepted ( just accepted ) page： just accepted - just accepted 2021.4

Preparation of Colloidal Monodisperse Hollow Organosiloxane-based Nanoparticles with Double Mesoporous Shell Reviewed

T. Watanabe, E. Yamamoto, H. Wada, A. Shimojima, K. Kuroda

Bulletin of the Chemical Society of Japan Vol. just accepted ( just accepted ) page： just accepted - just accepted 2021.4

Preparation of Sub-50 nm Colloidal Monodispersed Hollow Siloxane-Based Nanoparticles with Controlled Shell Structures Reviewed

Tenkai Watanabe, Eisuke Yamamoto, Saki Uchida, Lulu Cheng, Hiroaki Wada, Atsushi Shimojima, and Kazuyuki Kuroda

Langmuir Vol. 36 ( 46 ) page： 13833 - 13842 2020.11

Mesoporous Silica Nanoparticles with Dispersibility in Organic Solvents and Their Versatile Surface Modification Reviewed

E.Yamamoto, A. Shimojima, H. Wada, K. Kuroda

Langmuir Vol. 36 page： 5571 - 5578 2020.4

Transformation of Mesostructured Silica Nanoparticles into Colloidal Hollow Nanoparticles in the Presence of a Bridged-Organosiloxane Shell Reviewed

Eisuke Yamamoto, Saki Uchida, Atsushi Shimojima, Hiroaki Wada, and Kazuyuki Kuroda

Chemistry of Materials Vol. 30 ( 2 ) page： 540-548 2018.1

Fabrication of Colloidal Crystals Composed of Pore-expanded Mesoporous Silica Nanoparticles Prepared by a Controlled Growth Method Reviewed Open Access

Eisuke Yamamoto, Seiya Mori, Atsushi Shimojima, Hiroaki Wada, and Kazuyuki Kuroda

Nanoscale Vol. 9 ( 7 ) page： 2464-2470 2017.2

Colloidal Mesoporous Silica Nanoparticles Invited Reviewed Open Access

Eisuke Yamamoto, and Kazuyuki Kuroda

Bulletin of the Chemical Society of Japan Vol. 89 ( 5 ) page： 501-539 2016.5

Tailored Nitrogen Doping of Titania Nanosheets Revealed by a Combined Photoelectron Spectroscopy Reviewed Open Access

Makoto Kobayashi, Naoki Hagishima, Eisuke Yamamoto, Minoru Osada

Advanced Materials Interfaces 2025.11

Covalent Functionalization of MXenes with Porphyrin for Visible‐Light Activation in Energy Conversion Nanodevices Reviewed

Hong Li, Ruben Canton‐Vitoria, Yuto Urano, Sudhanshu Kumar Nayak, Eisuke Yamamoto, Makoto Kobayashi, Ryo Kitaura, Minoru Osada

Small 2025.8

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

Abstract

MXenes such as Ti3C2 and Ti3CN are 2D materials characterized by the presence of a Tx phase that passivates the reactive titanium surface. Modifying their chemical composition to anchor target molecules is of great interest for addressing key challenges, such as enhancing the conversion of visible light into electricity. In this study, a covalent functionalization strategy is developed to modify the Tx phase of Ti3C2 or Ti3CN with alkyl amines, followed by coupling with Zn‐porphyrin. This process activates the optical properties of MXenes without causing any damage. X‐ray photoelectron spectroscopy and infrared spectroscopy are pivotal in confirming the covalent functionalization, while thermogravimetric analysis, transmission electron microscopy, and additional techniques provided further insights into structural and chemical features. Spectroelectrochemical investigations reveal carrier injection into MXenes under light illumination, potentially enhancing conductivity. Photodetectors fabricated from these films demonstrate responsivities of 1.4–15.0 A W−1 and external quantum efficiencies ranging from 1300 to 2830% in the visible range, making them comparable to well‐established hybrid 2D nanomaterials like MoS2 and WS2.

DOI： 10.1002/smll.202503895

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Mechanical exfoliation of non-van der Waals solids: a study of layered perovskite ferroelectric CsPb2Nb3O10 Reviewed

Masanari Shimada, Yan Li, Makoto Kobayashi, Eisuke Yamamoto, Ruben Canton-Vitoria, Minoru Osada

Chemistry Letters Vol. 54 ( 2 ) 2025.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Oxford University Press (OUP)

Abstract

Mechanical exfoliation of layered materials is one of the most effective methods for obtaining 2D nanosheets. However, this approach is still limited to van der Waals (vdW) layered materials, where interlayer interactions are governed by weak vdW forces. In this study, we used a layered perovskite ferroelectric (CsPb2Nb3O10) as a model system to explore the mechanical exfoliation behavior of ionically bonded non-vdW layered materials. Due to the relatively weak out-of-plane bonds involving the interlayer Cs⁺ ions, CsPb2Nb3O10 could be cleaved into ultrathin sheets with thicknesses ranging from 7.5 to 50 nm. Using piezoresponse force microscopy, we investigated the thickness-dependent ferroelectric properties of CsPb2Nb3O10 nanosheets.

DOI： 10.1093/chemle/upaf006

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Other Link： https://academic.oup.com/chemlett/article-pdf/54/2/upaf006/61648459/upaf006.pdf

Atomic Layer Engineering of Ferroelectricity in Dion–Jacobson Perovskites Reviewed

Shu Morita, Daisuke Urushihara, Keita Nishibashi, Makoto Kobayashi, Eisuke Yamamoto, Toru Asaka, Hiroshi Nakajima, Shigeo Mori, Minoru Osada

Journal of the American Chemical Society 2024.8

Atomic Layer Engineering of Pd Nanosheets for an Enhanced Hydrogen Evolution Reaction Reviewed

Sumiya Ando, Eisuke Yamamoto, Makoto Kobayashi, Minoru Osada

Nano Letters 2024.8

Ultrafast 2D Nanosheet Assembly via Spontaneous Spreading Phenomenon Reviewed

Yue Shi, Hong Li, Hirofumi Tsunematsu, Harumi Ozeki, Kimiko Kano, Eisuke Yamamoto, Makoto Kobayashi, Hiroya Abe, Chun‐Wei Chen, Minoru Osada

Small 2024.7

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

Abstract

In 2D materials, a key engineering challenge is the mass production of large‐area thin films without sacrificing their uniform 2D nature and unique properties. Here, it is demonstrated that a simple fluid phenomenon of water/alcohol solvents can become a sophisticated tool for self‐assembly and designing organized structures of 2D nanosheets on a water surface. In situ, surface characterizations show that water/alcohol droplets of 2D nanosheets with cationic surfactants exhibit spontaneous spreading of large uniform monolayers within 10 s. Facile transfer of the monolayers onto solid or flexible substrates results in high‐quality mono‐ and multilayer films with high coverages (>95%) and homogeneous electronic/optical properties. This spontaneous spreading is quite general and can be applied to various 2D nanosheets, including metal oxides, graphene oxide, h‐BN, MoS2, and transition metal carbides, enabling on‐demand smart manufacture of large‐size (>4 inchϕ) 2D nanofilms and free‐standing membranes.

DOI： 10.1002/smll.202403915

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Other Link： https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.202403915

Hetero-assembly design of 2D oxide nanosheets for tailored thermal shielding materials Reviewed

Hirofumi Tsunematsu, Keita Nishibashi, Eisuke Yamamoto, Makoto Kobayashi, Tomohiro Yoshida, Minoru Osada

Applied Physics Express Vol. 17 ( 1 ) 2024.1

Ferroelectricity in CsPb2Nb3O10 and exfoliated 2D nanosheets Reviewed

Yan Li, Masanari Shimada, Makoto Kobayashi, Eisuke Yamamoto, Ruben Canton-Vitoria, Xiaoyan Liu, Minoru Osada

Dalton Transactions 2024

Facile Synthesis of Pd Nanosheets and Implications for Superior Catalytic Activity Reviewed

Sumiya Ando, Eisuke Yamamoto, Makoto Kobayashi, Akichika Kumatani, Minoru Osada

ACS Nano Vol. 18 ( 1 ) page： 461 - 469 2023.11

2D Bismuth Oxyfluorides: A New Member of Cationic Nanosheets Reviewed Open Access

Makoto Kobayashi, Tsubasa Tasaka, Eisuke Yamamoto, Minoru Osada

Chemistry Letters Vol. 52 ( 6 ) page： 449 - 451 2023.6

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

Two kinds of single-crystalline oxyfluoride nanosheets were synthesized by exfoliation of layered bismuth oxyfluorides intercalated with nitrates. The solution-based exfoliation process produced multilayered cationic oxyfluoride nanosheets with thicknesses of several nanometers. A second harmonic generation measurement clarified that one of the nanosheets had a noncentrosymmetric structure. This is the first example of a cationic nanosheet with nonlinear optical properties.

DOI： 10.1246/cl.230136

Ultrahigh Energy Storage in 2D High-κ Perovskites Reviewed

Hyung-Jun Kim, Shu Morita, Ki-Nam Byun, Yue Shi, Takaaki Taniguchi, Eisuke Yamamoto, Makoto Kobayashi, Yasuo Ebina, Takayoshi Sasaki, Minoru Osada

Nano Letters Vol. 23 ( 9 ) page： 3788 - 3795 2023.5

Gigantic Thermal Shielding in 2D Oxide Nanosheets Reviewed International journal

Hirofumi Tsunematsu, Yue Shi, Eisuke Yamamoto, Makoto Kobayashi, Tomohiro Yoshida, Minoru Osada

ACS Nano Vol. 17 ( 12 ) page： 11396 - 11405 2023.5

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

Thermal shielding materials that can block near-infrared (NIR) light from the sunlight while maintaining visible transparency have become increasingly important from an energy-saving perspective. Here, we demonstrate a gigantic NIR shielding by an engineered plasmonic material based on a two-dimensional (2D) polytungstate (Cs4-xW11O35-d). Starting from a charge-neutral polytungstate (Cs4W11O35), we synthesize charge-imbalanced 2D nanosheets (Cs4-xW11O35-d) that undergo an unusual structural change with the semiconductor-to-metal transition in a reduced atmosphere. Layer-by-layer engineering of the 2D nanosheets enables a plasmon-induced enhancement of the NIR reflectance (>53%) with a high visible transparency (>71%), realizing high-performance thermal shielding. Our approach offers a solution for future thermal management technology.

DOI： 10.1021/acsnano.3c00815

Pseudo-Topotactic Transformation from Oxide Nanosheets to Amorphous Nanosheets Reviewed Open Access

Hikaru Sugimoto, Makoto Kobayashi, Eisuke Yamamoto, Minoru Osada

Chemistry Letters Vol. 52 ( 5 ) page： 322 - 324 2023.5

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

We demonstrated the synthesis of amorphous oxide nanosheets from crystalline nanosheets prepared by the exfoliation of layered compounds. Single-crystalline oxide nanosheets were calcined with C3N4 powder in flowing nitrogen and annealed in air to produce amorphous oxide nanosheets. The cation composition and valence, shape, lateral size, surface roughness, and thickness were not changed by treatment. This approach enables the production of amorphous oxide nanosheets with distinct morphologies and compositions and large lateral sizes.

DOI： 10.1246/cl.230073

Composite design of two-dimensional inorganic nanosheets for flexible energy storage capacitors Reviewed Open Access

Ki-Nam Byun, Yue Shi, Eisuke Yamamoto, Makoto Kobayashi, Minoru Osada

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN Vol. 131 ( 4 ) page： 77 - 82 2023.4

Language：English Publishing type：Research paper (scientific journal) Publisher：CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI

We present a new approach for designing flexible energy storage capacitors using two-dimensional (2D) inor-ganic nanosheets. 2D dielectric Ca2Nb3O10 nanosheet and ferroelectric poly(vinylidene fluoride) (PVDF) were selected as model material systems. Langmuir-Blodgett deposition was utilized for layer-by-layer engineering of (Ca2Nb3O10/PVDF) nanocomposite films on an indium tin oxide (ITO)-coated polyethylene terephthalate (PET) substrate. Such a new composite design realized the simultaneous improvement of energy density (37 J cm13) and efficiency (378 %) even in the ultrathin form (320 nm) on the ITO-coated PET substrate. Nanosheet-based flexible capacitors also maintained a stable performance even after 104 times bending cycles. These results indi-cate that our nanosheet approach is of technological importance for exploring new flexible dielectric capacitors.(c) 2023 The Ceramic Society of Japan. All rights reserved.

DOI： 10.2109/jcersj2.22150

Molecularly Thin BaTiO 3 Nanosheets with Stable Ferroelectric Response Reviewed Open Access

Kazuki Hagiwara, Ki Nam Byun, Shu Morita, Eisuke Yamamoto, Makoto Kobayashi, Xiaoyan Liu, Minoru Osada

Advanced Electronic Materials Vol. 9 ( 4 ) page： 2201239 - 2201239 2023.4

Automated One-Drop Assembly for Facile 2D Film Deposition Reviewed

Yue Shi, Eisuke Yamamoto, Makoto Kobayashi, Minoru Osada

ACS Applied Materials & Interfaces Vol. 15 ( 18 ) page： 22737 - 22743 2023.3

Free‐Standing Molecularly Thin Amorphous Silica Nanosheets Reviewed Open Access

Eisuke Yamamoto, Kosuke Fujihara, Yuma Takezaki, Kentaro Ito, Yue Shi, Makoto Kobayashi, Minoru Osada

Small Vol. 19 ( 22 ) page： 2300022 - 2300022 2023.2

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Wiley

DOI： 10.1002/smll.202300022

Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1002/smll.202300022

Molecularly Thin BaTiO3 Nanosheets with Stable Ferroelectric Response Reviewed Open Access

Kazuki Hagiwara, Ki Nam Byun, Shu Morita, Eisuke Yamamoto, Makoto Kobayashi, Xioyang Liu, Minoru Osada

Advanced Electronic Materials 2023.2

Damage-free LED lithography for atomically thin 2D material devices Reviewed Open Access

Yue Shi, Takaaki Taniguchi, Ki-Nam Byun, Daiki Kurimoto, Eisuke Yamamoto, Makoto Kobayashi, Kazuhito Tsukagoshi, Minoru Osada

Scientific Reports Vol. 13 ( 1 ) page： 2583 2023.2

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Desired electrode patterning on two-dimensional (2D) materials is a foremost step for realizing the full potentials of 2D materials in electronic devices. Here, we introduce an approach for damage-free, on-demand manufacturing of 2D material devices using light-emitting diode (LED) lithography. The advantage of this method lies in mild photolithography by simply combining an ordinary optical microscope with a commercially available LED projector; the low-energy red component is utilized for optical characterization and alignment of devices, whereas the high-energy blue component is utilized for photoresist exposure and development of personal computer designed electrode patterns. This method offers maskless, damage-free photolithography, which is particularly suitable for 2D materials that are sensitive to conventional lithography. We applied this LED lithography to device fabrication of selected nanosheets (MoS2, graphene oxides and RuO2), and achieved damage-free lithography of various patterned electrodes with feature sizes as small as 1–2 μm. The LED lithography offers a useful approach for cost-effective mild lithography without any costly instruments, high vacuum, or complex operation.

DOI： 10.1038/s41598-023-29281-w

Other Link： https://www.nature.com/articles/s41598-023-29281-w

Improved Energy Storage Performance of PVDF Nanocapacitors by Utilizing 2D Inorganic Barrier Layers Reviewed

Ki-Nam Byun, Eisuke Yamamoto, Makoto Kobayashi, Minoru Osada

Chemistry Letters Vol. 52 ( 1 ) page： 51 - 54 2023.1

Hard-template synthesis of hollow mesoporous silica nanoplates using layered double hydroxide Reviewed

Y.Shi, J. Wang, E. Yamamoto, M. Osada

Chemistry Letters Vol. 49 page： 1078 - 1080 2020.6

Pore Clogging of Colloidal Mesoporous Silica Nanoparticles for Encapsulating Guest Species Reviewed

Eisuke Yamamoto, Kouya Nagata, Kenta Onishi, Chihiro Urata, Atsushi Shimojima, Hiroaki Wada, Shinji Takeoka and Kazuyuki Kuroda

Bulletin of the Chemical Society of Japan Vol. 90 ( 6 ) page： 706-708 2017.6

Precise Synthesis of Mesoporous Silica Nanoparticles Open Access

Yamamoto Eisuke, Shimojima Atsushi, Kuroda Kazuyuki

Journal of the Japanese Association for Crystal Growth Vol. 44 ( 2 ) page： 82-87 2017

Language：Japanese

Mesoporous silica nanoparticles have attracted great attention because of their potential applications as catalysts, drug/gene delivery carriers, and optical materials because of high surface area, large pore volume, transparency, biocompatibility, and high cell uptake efficiency. This review reports general preparation and applications of mesoporous silica nanoparticles, and our recent efforts on the preparation of well-dispersed mesoporous silica nanoparticles with precisely controlled particle size, pore size, functionality, and morphology.

DOI： 10.19009/jjacg.44.2_82

Open Access

CiNii Research

Effective Use of Alkoxysilanes with Different Hydrolysis Rates for Particle Size Control of Aqueous Colloidal Mesostructured and Mesoporous Silica Nanoparticles by the Seed-Growth Method Reviewed

Hironori Yamada, Chihiro Urata, Eisuke Yamamoto, Sayuri Higashitamori, Yusuke Yamauchi, and Kazuyuki Kuroda

ChemNanoMat Vol. 1 ( 3 ) page： 194-202 2015.7

A multifunctional role of trialkylbenzenes for the preparation of aqueous colloidal mesostructured/mesoporous silica nanoparticles with controlled pore size, particle diameter, and morphology Reviewed Open Access

Yamada Hironori, Ujiie Hiroto, Urata Chihiro, Yamamoto Eisuke, Yamauchi Yusuke, Kuroda Kazuyuki

NANOSCALE Vol. 7 ( 46 ) page： 19557-19567 2015

Preparation of Size-Controlled Monodisperse Colloidal Mesoporous Silica Nanoparticles and Fabrication of Colloidal Crystals Reviewed

Eisuke Yamamoto, Masaki Kitahara, Takuya Tsumura, and Kazuyuki Kuroda

Chemistry of Materials Vol. 26 ( 9 ) page： 2927-2933 2014.5

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Papers - YAMAMOTO Eisuke