研究者詳細 - 山本　瑛祐

論文 - 山本　瑛祐

分割表示 35 件中 1 - 20 件目／全件表示 >>

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

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年11月

Solid-state surfactant templating for controlled synthesis of amorphous 2D oxide/oxyhydroxide nanosheets 査読有り

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

Nature Communications 15 巻頁： 6612 2024年8月

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 58 巻 ( 7 ) 頁： 441 - 444 2023年7月

Free-Standing Molecularly Thin Amorphous Silica Nanosheets 査読有り

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

Small 頁： 2300022 2023年2月

Tailored synthesis of molecularly thin platinum nanosheets using designed 2D surfactant solids 査読有り

Eisuke Yamamoto, Akiko Suzuki, Makoto Kobayashi, Minoru Osada

Nanoscale 14 巻頁： 11561 - 11567 2022年6月

Formation of Closed Pores in Mesoporous Silica Nanoparticles by Hydrothermal Treatment 査読有り

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

Bulletin of the Chemical Society of Japan just accepted 巻 ( just accepted ) 頁： just accepted - just accepted 2021年4月

Preparation of Colloidal Monodisperse Hollow Organosiloxane-based Nanoparticles with Double Mesoporous Shell 査読有り

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

Bulletin of the Chemical Society of Japan just accepted 巻 ( just accepted ) 頁： just accepted - just accepted 2021年4月

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

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

Langmuir 36 巻 ( 46 ) 頁： 13833 - 13842 2020年11月

Mesoporous Silica Nanoparticles with Dispersibility in Organic Solvents and Their Versatile Surface Modification 査読有り

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

Langmuir 36 巻頁： 5571 - 5578 2020年4月

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

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

Chemistry of Materials 30 巻 ( 2 ) 頁： 540-548 2018年1月

Fabrication of Colloidal Crystals Composed of Pore-expanded Mesoporous Silica Nanoparticles Prepared by a Controlled Growth Method 査読有り

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

Nanoscale 9 巻 ( 7 ) 頁： 2464-2470 2017年2月

Colloidal Mesoporous Silica Nanoparticles 招待有り査読有り

Eisuke Yamamoto, and Kazuyuki Kuroda

Bulletin of the Chemical Society of Japan 89 巻 ( 5 ) 頁： 501-539 2016年5月

Atomic Layer Engineering of Ferroelectricity in Dion–Jacobson Perovskites 査読有り

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年8月

Atomic Layer Engineering of Pd Nanosheets for an Enhanced Hydrogen Evolution Reaction 査読有り

Sumiya Ando, Eisuke Yamamoto, Makoto Kobayashi, Minoru Osada

Nano Letters 2024年8月

Ultrafast 2D Nanosheet Assembly via Spontaneous Spreading Phenomenon 査読有り

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

Small 2024年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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, MoS<sub>2</sub>, 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

その他リンク： https://onlinelibrary.wiley.com/doi/pdf/10.1002/smll.202403915

Hetero-assembly design of 2D oxide nanosheets for tailored thermal shielding materials 査読有り

Tsunematsu, H; Nishibashi, K; Yamamoto, E; Kobayashi, M; Yoshida, T; Osada, M

APPLIED PHYSICS EXPRESS 17 巻 ( 1 ) 2024年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Applied Physics Express

We present a new approach for designing thermal shielding materials using two-dimensional oxide nanosheets. Our approach uses hetero-assembly design [(Ti0.87O2)m (Cs2.7W11O35−d )20 (m = 0, 5, 10)] by overlaying high refractive index (n) Ti0.87O2 nanosheets with transparent conducting Cs2.7W11O35−d nanosheets. Through proper design of the thickness of high-n Ti0.87O2 layers, we achieved the optimum thermal shielding properties with a high NIR reflectance (>46%), a high visible transparency (>76%) and a neutral color in an ultrathin form (<60 nm). Our nanosheet approach is of technological importance for exploring new thermal shielding materials.

DOI： 10.35848/1882-0786/ad13ce

Web of Science

Scopus

Ferroelectricity in CsPb2Nb3O10 and exfoliated 2D nanosheets 査読有り

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

Dalton Transactions 2024年

Facile Synthesis of Pd Nanosheets and Implications for Superior Catalytic Activity 査読有り

Ando, S; Yamamoto, E; Kobayashi, M; Kumatani, A; Osada, M

ACS NANO 18 巻 ( 1 ) 頁： 461 - 469 2023年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ACS Nano

As a member of the 2D materials family, 2D metal nanosheets (metallenes) have received increasing attention due to their intriguing properties distinct from those of graphene and other inorganic 2D nanosheets. However, the synthesis of metallenes is still challenging, owing to the lack of an efficient synthetic approach. Here we present a facile one-pot approach to the controlled synthesis of Pd nanosheets. A key feature of this process is a stepwise reaction using 2,4,6-trichlorophenyl formate (TCPF); TCPF emits carbon monoxide gas, which acts as both a reductant and a surface capping agent, promoting the anisotropic 2D growth of the Pd nanosheets. Photoemission spectroscopy revealed some peculiar features of the surface charge and valence band states due to suppressed electron transfer at the 2D surface. This surface state caused improved catalytic activity for the hydrogen evolution reaction compared to that of bulk Pd.

DOI： 10.1021/acsnano.3c07861

Web of Science

Scopus

PubMed

2D Bismuth Oxyfluorides: A New Member of Cationic Nanosheets 査読有り

Kobayash, M; Tasaka, T; Yamamoto, E; Osada, M

CHEMISTRY LETTERS 52 巻 ( 6 ) 頁： 449 - 451 2023年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Chemistry Letters

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

Web of Science

Scopus

CiNii Research

Ultrahigh Energy Storage in 2D High-κ Perovskites 査読有り

Kim, HJ; Morita, S; Byun, KN; Shi, Y; Taniguchi, T; Yamamoto, E; Kobayashi, M; Ebina, Y; Sasaki, T; Osada, M

NANO LETTERS 23 巻 ( 9 ) 頁： 3788 - 3795 2023年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nano Letters

Dielectric capacitors have greater power densities than batteries, and, unlike batteries, they do not utilize chemical reactions during cycling. Thus, they can become ideal, safe energy storage devices. However, dielectric capacitors yield rather low energy densities compared with other energy storage devices such as batteries and supercapacitors. Here, we present a rational approach for designing ultrahigh energy storage capacitors using two-dimensional (2D) high-κ dielectric perovskites (Ca2Nam-3NbmO3m+1; m = 3-6). Individual Ca2Nam-3NbmO3m+1 nanosheets exhibit an ultrahigh dielectric strength (638-1195 MV m-1) even in the monolayer form, which exceeds those of conventional dielectric materials. Multilayer stacked nanosheet capacitors exhibit ultrahigh energy densities (174-272 J cm-3), high efficiencies (>90%), excellent reliability (>107 cycles), and temperature stability (−50-300 °C); the maximum energy density is much higher than those of conventional dielectric materials and even comparable to those of lithium-ion batteries. Enhancing the energy density may make dielectric capacitors more competitive with batteries.

DOI： 10.1021/acs.nanolett.3c00079

Web of Science

Scopus

PubMed

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