Journal
NEW JOURNAL OF CHEMISTRY
Volume 41, Issue 12, Pages 4950-4958Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nj00246g
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Funding
- National Key R&D Project from Minister of Science and Technology of China [2016YFA0202702]
- National Natural Science Foundation of China [21571186]
- Guangdong Innovative Research Team Program [2011D052]
- Youth Innovation Promotion Association [2017411]
- Guangdong Tezhi plan youth talent of science and technology [2014TQ01C102]
- Shenzhen Basic Research Plan [JSGG201505 12145714246, JCYJ20140610152828685]
- SIAT Innovation Program for Excellent Young Researchers [Y6G004]
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Copper nanowires (CuNWs) are extremely prone to oxidation, which greatly limits their practical applications, even though they are inexpensive, abundant and have high electrical conductivity. Herein, a facile and novel method is developed to alleviate the oxidation of CuNWs by embedding CuNWs into water-dispersible modified graphene (WGP) sheets to form a uniform hybrid conductive film using a simple vacuum filtration process. The CuNWs and WGP films possess electrical conductivity of 3.19 x 10(3) S m(-1) and 5.6 x 10(3) S m(-1), respectively. With the addition of WGP to form a CuNWs-WGP hybrid film, the electrical conductivity of the CuNWs is further improved to 3.02 x 10(4) S m(-1) due to the synergistic effects of the CuNWs and WGP. The CuNWs-WGP hybrid films show excellent antioxidative stability even after exposure in air for 8 weeks without any obvious oxidation. Then, using this conductive hybrid film, a sandwich structured PDMS/CuNWs-WGP/PDMS flexible strain sensor was fabricated. The strain sensor exhibits good flexibility and stretchability with only less than 15% loss of electrical conductivity over 450 times mechanical bending, and was successfully used to monitor human motion, such as finger bending, swallowing and voice recognition.
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