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[[Vol. 56]How Do Neuromorphic Nanowire Networks Find Routes to Convey Signals__ WPI-MANA.pdf](https://mdr.nims.go.jp/filesets/9cb14e7e-f954-4d1f-8c04-e88a2330809a/download)

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International Center for Materials Nanoarchitectonics (WPI-MANA)

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[[Research Highlights Vol.56] How Do Neuromorphic Nanowire Networks Find Routes to Convey Signals?](https://mdr.nims.go.jp/datasets/d68f5465-8b69-4352-90b0-cf1ed9e1ecca)

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2022/03/31 16:24 How Do Neuromorphic Nanowire Networks Find Routes to Convey Signals?| MANAhttps://www.nims.go.jp/mana/research/highlights/vol56.html 1/2Previous  Index  NextResearch Highlights[Vol. 56]How Do Neuromorphic Nanowire Networks Find Routes to Convey Signals?19 Mar, 2020Researchers at MANA have investigated the dynamical behavior of neuromorphicsystems made of memristive nano-switches connected together forming complexnetworks. They have shown experimentally the interplay between network topology andmemristor dynamics giving rise to self-organized states.In self-assembled networks of polymer-coated silver nanowires, the junction between twoconnected nanowires acts as a memristive switch. Upon application of current-voltage cycles it isseen that the network as a whole also behaves as a memristor, showing critical activation.However, when transient signals are applied to the network, random events produced by thebreakage of individual junctions could affect the conduction properties of the whole network.Thousands of memristive junctions interact when electrical current is passing through, dynamicallyrouting current through the network as switching events occur between individual nanowires. Thiscomplex dynamical landscape has been sorted out by devising an original measurement scheme inwhich both the static and dynamic properties of the network are systematically distinguished. Ithas been shown that the critical activation that is characterized by a sudden increase inconductance through networks is accompanied by a change in the power-law collective dynamics.The MANA researchers discovered that an activated network finds a route to convey current in ahttps://www.nims.go.jp/mana/research/highlights/vol55.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttps://www.nims.go.jp/mana/research/highlights/vol57.html2022/03/31 16:24 How Do Neuromorphic Nanowire Networks Find Routes to Convey Signals?| MANAhttps://www.nims.go.jp/mana/research/highlights/vol56.html 2/2self-organized manner, but sudden bursts of reorganization events occur whenever individualjunctions fail, and the network finds other pathways, thus self-repairing.This emergent and collective behavior provides a promising venue not only to understand betterthe collective dynamics of other complex systems, i.e., the brains, but also to explore newstrategies for hardware integration of these networks as unconventional computing devices withthe capability to perform machine learning tasks.This research was carried out by Tomonobu Nakayama (Deputy Director, MANA PrincipalInvestigator (PI), MANA, NIMS) and his team.Reference"Emergent dynamics of neuromorphic nanowire networks"Adrian Diaz-Alvarez, Rintaro Higuchi, Paula Sanz-Leon, Ido Marcus, Yoshitaka Shingaya, Adam Z.Stieg, James K. Gimzewski, Zdenka Kuncic, and Tomonobu NakayamaJournal : Scientific Reports [October 17, 2019]DOI : 10.1038/s41598-019-51330-6(Press release on this research)" Brain-like Functions Emerging in a Metallic Nanowire Network" (11 November 2019)https://www.nims.go.jp/mana/news_room/press/2019111101.html（MANA E-BULLETIN）https://www.nims.go.jp/mana/ebulletin/AffiliationsInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for MaterialsScience (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, JapanContact informationInternational Center for Materials Nanoarchitectonics(WPI-MANA)National Institute for Materials Science1-1 Namiki, Tsukuba, Ibaraki 305-0044 JapanPhone: +81-29-860-4710E-mail: mana-pr[AT]ml.nims.go.jphttps://samurai.nims.go.jp/profiles/nakayama_tomonobu?locale=enhttps://samurai.nims.go.jp/profiles/shingaya_yoshitaka?locale=enhttps://samurai.nims.go.jp/profiles/nakayama_tomonobu?locale=enhttps://www.nature.com/articles/s41598-019-51330-6https://www.nims.go.jp/mana/news_room/press/2019111101.htmlhttps://www.nims.go.jp/mana/ebulletin/