https://scholars.lib.ntu.edu.tw/handle/123456789/633924
標題: | Two-Dimensional Mechano-thermoelectric Heterojunctions for Self-Powered Strain Sensors | 作者: | Wang, Ying-Yu Chen, Ding-Rui Wu, Jen-Kai Wang, Tian-Hsin Chuang, Chiashain SSU-YEN HUANG Hsieh, Wen-Pin Mario Hofmann YUAN-HUEI CHANG Hsieh, Ya-Ping |
關鍵字: | multifunctional materials; strain sensors; structural health monitoring; thermoelectrics; tin diselenide | 公開日期: | 25-八月-2021 | 卷: | 21 | 期: | 16 | 來源出版物: | Nano letters | 摘要: | We here demonstrate the multifunctional properties of atomically thin heterojunctions that are enabled by their strong interfacial interactions and their application toward self-powered sensors with unprecedented performance. Bonding between tin diselenide and graphene produces thermoelectric and mechanoelectric properties beyond the ability of either component. A record-breaking ZT of 2.43 originated from the synergistic combination of graphene's high carrier conductivity and SnSe2-mediated thermal conductivity lowering. Moreover, spatially varying interaction at the SnSe2/graphene interface produces stress localization that results in a novel 2D-crack-assisted strain sensing mechanism whose sensitivity (GF = 450) is superior to all other 2D materials. Finally, a graphene-assisted growth process permits the formation of high-quality heterojunctions directly on polymeric substrates for flexible and transparent sensors that achieve self-powered strain sensing from a small temperature gradient. Our work enhances the fundamental understanding of multifunctionality at the atomic scale and provides a route toward structural health monitoring through ubiquitous and smart devices. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633924 | ISSN: | 15306984 | DOI: | 10.1021/acs.nanolett.1c02331 |
顯示於: | 物理學系 |
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