期刊
NANO RESEARCH
卷 11, 期 4, 页码 1938-1955出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1811-0
关键词
flexible strain sensor; printable electronics; human motion monitoring; conductive elastic composites; silver-coated polymer spheres
类别
资金
- National Key RD Project [2016YFA0202702]
- National Natural Science Foundation of China [61701488, 21571186]
- Leading Scientific Research Project of Chinese Academy of Sciences [QYZDY-SSW-JSC010]
- Youth Innovation Promotion Association [2017411]
- Guangdong Provincial Key Laboratory [2014B030301014]
- Guangdong TeZhi Plan Youth Talent of Science and Technology [2014TQ01C102]
- Shenzhen Basic Research plan [JSGG20150512145714246, JSGG20160229155249762]
- SIAT Innovation Program for Excellent Young Researchers [2016005]
Strain sensors with high stretchability, broad strain range, high sensitivity, and good reliability are desirable, owing to their promising applications in electronic skins and human motion monitoring systems. In this paper, we report a high-performance strain sensor based on printable and stretchable electrically conductive elastic composites. This strain sensor is fabricated by mixing silver-coated polystyrene spheres (PS@Ag) and liquid polydimethylsiloxane (PDMS) and screen-printed to a desirable geometry. The strain sensor exhibits fascinating comprehensive performances, including high electrical conductivity (1.65 x 104 S/m), large workable strain range (> 80%), high sensitivity (gauge factor of 17.5 in strain of 0%-10%, 6.0 in strain of 10%-60% and 78.6 in strain of 60%-80%), inconspicuous resistance overshoot (< 15%), good reproducibility and excellent long-term stability (1,750 h at 85 A degrees C/85% relative humidity) for PS@Ag/PDMS-60, which only contains similar to 36.7 wt.% of silver. Simultaneously, this strain sensor provides the advantages of low-cost, simple, and large-area scalable fabrication, as well as robust mechanical properties and versatility in applications. Based on these performance characteristics, its applications in flexible printed electrodes and monitoring vigorous human motions are demonstrated, revealing its tremendous potential for applications in flexible and wearable electronics.
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