期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201903047
关键词
nanocracks; nanocrystals; temperature sensors; thermal expansion; transport mechanism
类别
资金
- Korea Electric Power Corporation (KEPCO) [18A-002]
- Future Planning and Creative Materials Discovery Program through the National Research Foundation of Korea [NRF-2018M3D1A1059001]
- National Research Foundation of Korea - Korea government [NRF-2019R1C1C1003319, NRF-2017R1D1A1B03033089, NRF-2018M3A7B4071110]
- National Research Foundation of Korea [2018M3A7B4071109] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Highly sensitive temperature sensors are designed by exploiting the interparticle distance-dependent transport mechanism in nanocrystal (NC) thin films based on a thermal expansion strategy. The effect of ligands on the electronic, thermal, mechanical, and charge transport properties of silver (Ag) NC thin films on thermal expandable substrates of poly(dimethylsiloxane) (PDMS) is investigated. While inorganic ligand-treated Ag NC thin films exhibit a low temperature coefficient of resistance (TCR), organic ligand-treated films exhibit extremely high TCR up to 0.5 K-1, which is the highest TCR exhibited among nanomaterial-based temperature sensors to the best of the authors' knowledge. Structural and electronic characterizations, as well as finite element method simulation and transport modeling are conducted to determine the origin of this behavior. Finally, an all-solution based fabrication process is established to build Ag NC-based sensors and electrodes on PDMS to demonstrate their suitability as low-cost, high-performance attachable temperature sensors.
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