期刊
NANOSCALE
卷 6, 期 20, 页码 11932-11939出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr03295k
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资金
- Fundamental Research Program of the Korean Institute of Materials Science (KIMS) [PNK3771]
- Korea Institute of Machinery & Materials (KIMM) [KM3330]
- Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2013043661]
Wearable strain sensors for human motion detection are being highlighted in various fields such as medical, entertainment and sports industry. In this paper, we propose a new type of stretchable strain sensor that can detect both tensile and compressive strains and can be fabricated by a very simple process. A silver nanoparticle (Ag NP) thin film patterned on the polydimethylsiloxane (PDMS) stamp by a single-step direct transfer process is used as the strain sensing material. The working principle is the change in the electrical resistance caused by the opening/closure of micro-cracks under mechanical deformation. The fabricated stretchable strain sensor shows highly sensitive and durable sensing performances in various tensile/compressive strains, long-term cyclic loading and relaxation tests. We demonstrate the applications of our stretchable strain sensors such as flexible pressure sensors and wearable human motion detection devices with high sensitivity, response speed and mechanical robustness.
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