Journal
NANO LETTERS
Volume 12, Issue 4, Pages 1789-1793Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl203803d
Keywords
Graphene; thermochemical reduction; electrical conductivity; polyimide composites; nanoelectromechanical sensor
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Funding
- Korea Institute of Science and Technology (KIST)
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
- World Class University (WCU) [R31-2008-20029]
- Ministry of Education, Science, and Technology
- ARL/ARO [W911NF]
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Highly conductive reduced graphene oxide (GO) polymer nano composites are synthesized by a well-organized in situ thermochemical synthesis technique. The surface functionalization of GO was carried out with aryl diazonium salt including 4-iodoaniline to form phenyl functionalized GO (I-Ph-GO). The thermochemically developed reduced, GO (R-I-Ph-GO) has five times higher electrical conductivity (42 000 S/m) than typical reduced GO (R-GO). We also demonstrate a R-I-Ph-GO/polyimide (PI) composites having more than 10(4) times higher conductivity (similar to 1 S/m) compared to a R-GO/PI composites. The electrical resistances of PI composites with R-I-Ph-GO were dramatically dropped under similar to 3% tensile strain. The R-I-Ph-GO/PI composites with electrically sensitive response caused by mechanical strain are expected to have broad implications for nanoelectromechanical systems.
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