Surface Design of Nanocrystals for High-Performance Multifunctional Sensors in Wearable and Attachable Electronics
- Authors
- Joh, Hyungmok; Lee, Woo Seok; Kang, Min Su; Seong, Mingi; Kim, Haneun; Bang, Junsung; Lee, Seung-Wook; Hossain, Md Ashraf; Oh, Soong Ju
- Issue Date
- 22-1월-2019
- Publisher
- AMER CHEMICAL SOC
- Citation
- CHEMISTRY OF MATERIALS, v.31, no.2, pp.436 - 444
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY OF MATERIALS
- Volume
- 31
- Number
- 2
- Start Page
- 436
- End Page
- 444
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/68257
- DOI
- 10.1021/acs.chemmater.8b03914
- ISSN
- 0897-4756
- Abstract
- Multifunctional temperaturestrain sensors that can simultaneously detect temperature and strain are fabricated through all-solution processes using colloidal Ag nanocrystals (NCs). Material and architecture design are introduced to efficiently distinguish signals, allowing accurate measurement from one sensor device. For material design, a ligand-exchange and reduction process is developed to increase the sensitivity. As a result, higher temperature coefficients of resistance, lower resistivity, and lower gauge factor values are observed. Furthermore, a partial oxidation process is used to widen the sensing range above 673 K, which overcomes the most challenging issue of nanomaterial-based sensors. For architecture design, three-dimensional mirror-stacked layer structures are fabricated at the top and bottom layers of the neutral mechanical plane for effective strain decoupling. Our twofold strategy provides a low-cost, simple, single-material-based method to achieve highly metallic thin films constructed on flexible substrates. Our sensor platforms can be fabricated on numerous substrates with a high pixel density for high spatial resolution, and we expect that they can be used for a variety of applications such as bioelectronics and robotics.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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