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Hydrogels as dynamic memory with forgetting ability

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Title: Hydrogels as dynamic memory with forgetting ability
Authors: Yu, Chengtao Browse this author
Guo, Honglei Browse this author
Cui, Kunpeng Browse this author →KAKEN DB
Li, Xueyu Browse this author
Ye, Ya Nan Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Gong, Jian Ping Browse this author →KAKEN DB
Keywords: dynamic memory
spontaneous forgetting
frustrated structure
nonequilibrium process
Issue Date: 11-Aug-2020
Publisher: National Academy of Sciences.
Journal Title: Proceedings of the National Academy of Sciences of the United States of America (PNAS)
Volume: 117
Issue: 32
Start Page: 18962
End Page: 18968
Publisher DOI: 10.1073/pnas.2006842117
Abstract: The memory of our brain, stored in soft matter, is dynamic, and it forgets spontaneously to filter unimportant information. By contrast, the existing manmade memory, made from hard materials, is static, and it does not forget without external stimuli. Here we propose a principle for developing dynamic memory from soft hydrogels with temperature-sensitive dynamic bonds. The memorizing-forgetting behavior is achieved based on fast water uptake and slow water release upon thermal stimulus, as well as thermal-history-dependent transparency change of these gels. The forgetting time is proportional to the thermal learning time, in analogy to the behavior of brain. The memory is stable against temperature fluctuation and large stretching; moreover, the forgetting process is programmable. This principle may inspire future research on dynamic memory based on the nonequilibrium process of soft matter.
Type: article (author version)
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 龔 剣萍 (Gong Jian Ping)

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