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Issue 20, 2014
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A stretchable strain sensor based on a metal nanoparticle thin film for human motion detection

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Abstract

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.

Graphical abstract: A stretchable strain sensor based on a metal nanoparticle thin film for human motion detection

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Article information


Submitted
15 Jun 2014
Accepted
11 Aug 2014
First published
13 Aug 2014

Nanoscale, 2014,6, 11932-11939
Article type
Paper
Author version available

A stretchable strain sensor based on a metal nanoparticle thin film for human motion detection

J. Lee, S. Kim, J. Lee, D. Yang, B. C. Park, S. Ryu and I. Park, Nanoscale, 2014, 6, 11932
DOI: 10.1039/C4NR03295K

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