In situ synthesis of thermochemically reduced graphene oxide conducting nanocomposites |
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Authors: | Park Ok-Kyung Hahm Myung Gwan Lee Sungho Joh Han-Ik Na Seok-In Vajtai Robert Lee Joong Hee Ku Bon-Cheol Ajayan Pulickel M |
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Affiliation: | Institute of Advanced Composites Materials, Korea Institute of Science and Technology 864-9 Dunsan-ri, Bongdong-eup, Wanju-gun, Jeollabuk-do, 565-902, Korea. |
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Abstract: | Highly conductive reduced graphene oxide (GO) polymer nanocomposites 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 (~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 ~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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