文献类型：期刊文献

英文题名：Self-Adhesive, Stretchable, and Thermosensitive Iontronic Hydrogels for Highly Sensitive Neuromorphic Sensing-Synaptic Systems

作者：Chen, Xuedan[1,2];Chen, Long[2,3];Zhou, Jianxian[2];Wu, Jiajun[2];Wang, Zhixun[3];Wei, Lei[3];Yuan, Shuanglong[1];Zhang, Qichong[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Key Lab Multifunct Nanomat & Smart Syst, Suzhou 215123, Peoples R China;[3]Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

年份：2024

卷号：24

期号：33

起止页码：10265

外文期刊名：NANO LETTERS

收录：;EI(收录号：20243316870784);WOS:【SCI-EXPANDED(收录号:WOS:001287552200001)】；

基金：This work was supported by the National Key R&D Program of China (2022YFA1203304), Natural Science Foundation of Jiangsu Province (BK20220288), Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (Start-up grant E1552102), the Singapore Ministry of Education Academic Research Fund Tier 2 (MOE2019-T2-2-127, MOE-T2EP50120-0002, and MOE-T2EP50123-0014), the Singapore Ministry of Education Academic Research Fund Tier 1 (RG62/22), A*STAR under AME IRG (A2083c0062), A*STAR under IAF-ICP Programme I2001E0067 and the Schaeffler Hub for Advanced Research at NTU, the IDMxS (Institute for Digital Molecular Analytics and Science) by the Singapore Ministry of Education under the Research Centres of Excellence scheme, and the NTU-PSL Joint Lab collaboration. We are grateful for the technical support of XPS characterization for Nano-X from Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences.

语种：英文

外文关键词：iontronic hydrogel; phase transition regulation; sensitive strain perception; visual temperature perception; synaptic plasticity

摘要：Artificial sensory afferent nerves that emulate receptor nanochannel perception and synaptic ionic information processing in chemical environments are highly desirable for bioelectronics. However, challenges persist in achieving life-like nanoscale conformal contact, agile multimodal sensing response, and synaptic feedback with ions. Here, a precisely tuned phase transition poly(N-isopropylacrylamide) (PNIPAM) hydrogel is introduced through the water molecule reservoir strategy. The resulting hydrogel with strongly cross-linked networks exhibits excellent mechanical performance (similar to 2000% elongation) and robust adhesive strength. Importantly, the hydrogel's enhanced ionic conductance and heterogeneous structure of the temperature-sensitive component enable highly sensitive strain information perception (GF(max) = 7.94, response time similar to 87 ms), temperature information perception (TCRmax = -1.974%/degrees C, response time similar to 270 ms), and low energy consumption synaptic plasticity (42.2 fJ/spike). As a demonstration, a neuromorphic sensing-synaptic system is constructed integrating iontronic strain/temperature sensors with fiber synapses for real-time information sensing, discrimination, and feedback. This work holds enormous potential in bioinspired robotics and bioelectronics.