Faculty Profiles - USAMI Yuki

Papers - USAMI Yuki

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Emergence of In‐Materio Intelligence from an Incidental Structure of a Single‐Walled Carbon Nanotube–Porphyrin Polyoxometalate Random Network Reviewed International journal

Deep Banerjee, Takumi Kotooka, Saman Azhari, Yuki Usami, Takuji Ogawa, James K. Gimzewski, Hakaru Tamukoh, Hirofumi Tanaka

Advanced Intelligent Systems 4 ( 4 ) 2100145 2022.01

Room temperature demonstration of in-materio reservoir computing for optimizing Boolean function with single-walled carbon nanotube/porphyrin-polyoxometalate composite Reviewed

Banerjee D., Azhari S., Usami Y., Tanaka H.

Applied Physics Express 14 ( 10 ) 2021.10

Performance of Ag-Ag<inf>2</inf>S core-shell nanoparticle-based random network reservoir computing device Reviewed

Hadiyawarman , Usami Y., Kotooka T., Azhari S., Eguchi M., Tanaka H.

Japanese Journal of Applied Physics 60 ( SC ) 2021.06

Sacrificial gold coating enhances transport of liquid metal in pressurized fountain pen lithography Reviewed

Livshits G.I., Bao J., Sakamoto L., Misaka T., Usami Y., Otsuka Y., Matsumoto T.

Scientific Reports 11 ( 1 ) 4670 2021.02

Conductance enhancement of PCBM thin films by gas-phase Au-doping

Nakajima Tsuyoshi, Misaka Tomoki, Usami Yuki, Otsuka Yoichi, Ohyama Hiroshi, Matsumoto Takuya

Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science ( The Japan Society of Vacuum and Surface Science ) 2020 ( 0 ) 2020.12

Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)

We found that conductance of PCBM thin films is enhanced by thermal vapor deposition of a small amount of gold, in which amount multiple tunneling conduction through gold islands can't occur, so in PCBM with gold deposition there is electrical conduction with other mechanism. The origin of such significant conductance enhancement is not revealed, but there is one possibility that gold works as the dopant of PCBM films. In this presentation, we will discuss it with spectroscopic data.

DOI： 10.14886/jvss.2020.0_267

CiNii Article

Other Link： https://ci.nii.ac.jp/naid/130007959460

Frequency dependence dielectrophoresis technique for bridging graphene nanoribbons Reviewed

Aji W.W., Usami Y., Hadiyawarman , Oyabu R., Tanaka H.

Applied Physics Express 13 ( 10 ) 2020.10

Local-field-induced current noise in shape-limited self-doped polyaniline Reviewed

Bao J., Otsuka Y., Etoh R., Usami Y., Matsumoto T.

Nanotechnology 31 ( 36 ) 2020.09

Visualization of Charge Migration in Conductive Polymers via Time-Resolved Electrostatic Force Microscopy Reviewed

Kajimoto K., Araki K., Usami Y., Ohoyama H., Matsumoto T.

Journal of Physical Chemistry A 124 ( 25 ) 5063 - 5070 2020.06

Toward physical reservoir system composed of polyaniline-Au nanoparticle random network Reviewed

Kawashima Yuya, Usami Yuki, Kotooka Takumi, Tanaka Hirofumi, Matsumoto Takuya

Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science ( The Japan Society of Vacuum and Surface Science ) 2020 ( 0 ) 268 2020.01

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

Reservoir computing (RC) is an information processing system that can replace the operations performed in the reservoir layer with physical behavior. We have previously shown that nonlinear I-V characteristics occur in a network consisting of self-doped polyaniline molecules (SPAN) and Au nanoparticles (AuNP). In this study, the nonlinear electrical and storage properties between multiple-input and multiple-output electrodes were investigated by nano-gap electrodes to explore the applicability of the SPAN-AuNP network to RC.

DOI： 10.14886/jvss.2020.0_268

CiNii Article

CiNii Research

Other Link： https://ci.nii.ac.jp/naid/130007959456

Conjugated electrical properties of Au nanoparticle-polyaniline network Reviewed

Usami Y., Otsuka Y., Naitoh Y., Matsumoto T.

Japanese Journal of Applied Physics 56 ( 12 ) 2017.12

Intra-grain conduction of self-doped polyaniline Reviewed

Usami Y., Imamura K., Akai T., Che D., Ohoyama H., Kobayashi H., Matsumoto T.

Journal of Applied Physics 120 ( 8 ) 2016.08

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Papers - USAMI Yuki