Electronic transport in composites of graphite oxide with carbon nanotubes |
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| Affiliation: | 1. Danubia NanoTech s.r.o., Ilkovičova 3, 84104 Bratislava, Slovakia;2. University of Vienna, Faculty of Physics, Group Physics of Nanostructured Materials, Boltzmanngasse 5, 1090 Vienna, Austria;3. Institute of Physics, Slovak Academy of Science, Dúbravská cesta 9, 845 11 Bratislava, Slovakia;4. International Laser Center, Ilkovičova 3, 84104 Bratislava, Slovakia;5. Institute of Electrical Engineering, Slovak Academy of Science, Dúbravská cesta 9, 845 11 Bratislava, Slovakia;1. Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan;2. Shanghai Toyo Tanso., Ltd., No. 486 Xinfei Road, Songjiang, Shanghai 201611, P.R. China;3. Advanced Carbon Technology Center, Toyo Tanso. Co., Ltd. 5-7-12, Takeshima, Nishiyodogawa-Ku, Osaka 555-0011, Japan;1. Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China;2. Henan Provincial Key Laboratory of Surface Interface Science, Zhengzhou University of Light Industry, Zhengzhou, 450001, PR China;3. School of Chemical Engineering, Tianjin University, Tianjin, 30072, PR China;1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, PR China;3. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, PR China;1. National Fusion Research Institute, Daejeon, Republic of Korea;2. Dongshin University, Naju, Republic of Korea |
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| Abstract: | We show that the presence of electrically insulating graphite oxide (GO) within a single wall carbon nanotube (SWCNT) network strongly enhances electrical conductivity, whereas reduced graphite oxide, even though electrically conductive, suppresses electrical conductivity within a composite network with SWCNTs. Measurements of Young’s modulus and of Raman spectra strongly support our interpretation of the “indirect” role of the oxide groups, present in GO within the SWCNT-GO composite, through electronic doping of metallic SWCNTs. |
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