Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 5, Issue 39, Pages 10167-10175Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc03636a
Keywords
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Funding
- Guangdong and Shenzhen Innovative Research Team Program [2011D052, KYPT20121228160843692]
- NSFC-Guangdong Jointed Funding [U1601202]
- NSFC-Shenzhen Robot Jointed Funding [U1613215]
- Natural Science Foundation of China [21601065]
- R&D Funds for basic Research Program of Shenzhen [JCYJ20150401145529012]
- Key Deployment Project of Chinese Academy of Sciences [KFZD-SW-202]
- National Key RD Project [2016YFA0202702]
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Stretchable strain sensors, as crucial components in wearable intelligent devices, have become one of the recent research hotspots with promising potential in human-interactive, personal health monitoring, and flexible smartphones. Graphene-based materials have been reported for high-performance strain sensors. However, there still remain some limitations such as their high production cost and low sensitivity and stretchability. Herein, a highly stretchable and ultra-sensitive strain sensor based on nickel nanoparticles and a graphene-coated polyurethane sponge (Ni@GPUS) ternary hybrid material has been reported. Herein, Ni@GPUS was fabricated via a series of techniques including preparation of a graphene-coated polyurethane sponge, electrodeposition of nickel nanoparticles, and encapsulation by polydimethylsiloxane. The obtained sensors can be stretched up to 65% and exhibit a remarkable gauge factor of up to 3360.09. Furthermore, a fast signal response (<100 ms) and 1000 cycles of stretching and bending prove the rapid steady state response and long-term durability of the sensor, respectively. In addition, the working mechanisms of the sensor have been proposed. Moreover, the strain sensor was used as a bodily motion sensor to monitor finger bending and facial muscle tension, showing great potential in the fields of flexible, stretchable, and wearable electronics.
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