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Paper Abstract and Keywords
Presentation 2026-04-25 14:05
[Invited Talk] Neuromorphic Function Expression in Conductive Polymers -- Bottleneck Introduction into Nanomolecular Networks --
Yuki Usami, Takuya Matsumoto (Univ. Osaka) SDM2026-3 OME2026-3
Abstract (in Japanese) (See Japanese page) 
(in English) In neuromorphic and in-materia computing, a material’s intrinsic nonlinearity and history dependence (state retention) are directly exploited as computational resources. In this study, we show that incorporating gold nanoparticles (AuNPs) into a sulfonated polyaniline (SPAN) network induces locally and partially dedoped regions in the vicinity of AuNPs, which act as bottlenecks in hopping-conduction pathways. Multi-electrode measurements reveal that the nonlinear I–V characteristics diversify depending on the electrode pairing (i.e., path selection), suggesting a percolation-like conduction picture. The nonlinearity can be described by a modified hopping model in which the locally enhanced electric field at the bottleneck is renormalized into an effective temperature. Moreover, the bottleneck functions as a charge trap, imparting long-term hysteresis that does not rely on wet electrochemical ionic conduction. Leveraging these nonlinearity and memory effects, we demonstrate a sum-of-products operation in the solid state at room temperature. This document is a Japanese reconstruction of the original article (CC BY 4.0) for a research meeting report.
Keyword (in Japanese) (See Japanese page) 
(in English) Neromorphic computation / Physical computation / Concuctive polymer networks / Hopping condution / Bottle neck / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 9, OME2026-3, pp. 9-14, April 2026.
Paper # OME2026-3 
Date of Issue 2026-04-18 (SDM, OME) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SDM2026-3 OME2026-3

Conference Information
Committee OME SDM  
Conference Date 2026-04-25 - 2026-04-25 
Place (in Japanese) (See Japanese page) 
Place (in English) AMA Home Plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Thin film devices (Si, compound, organic, flexible), Biotechnology, Materials, Characterization, etc. 
Paper Information
Registration To OME 
Conference Code 2026-04-OME-SDM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Neuromorphic Function Expression in Conductive Polymers 
Sub Title (in English) Bottleneck Introduction into Nanomolecular Networks 
Keyword(1) Neromorphic computation  
Keyword(2) Physical computation  
Keyword(3) Concuctive polymer networks  
Keyword(4) Hopping condution  
Keyword(5) Bottle neck  
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1st Author's Name Yuki Usami  
1st Author's Affiliation The University of Osaka (Univ. Osaka)
2nd Author's Name Takuya Matsumoto  
2nd Author's Affiliation The University of Osaka (Univ. Osaka)
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Speaker Author-2 
Date Time 2026-04-25 14:05:00 
Presentation Time 45 minutes 
Registration for OME 
Paper # SDM2026-3, OME2026-3 
Volume (vol) vol.126 
Number (no) no.8(SDM), no.9(OME) 
Page pp.9-14 
#Pages 6 
Date of Issue 2026-04-18 (SDM, OME) 

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