Faculty Profiles - YAMAMOTO Eisuke

Papers - YAMAMOTO Eisuke

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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