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Efficient Reduction of Graphite Oxide by Sodium Borohydride and Its Effect on Electrical Conductance

Authors

  • Hyeon-Jin Shin,

    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
    2. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
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  • Ki Kang Kim,

    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
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  • Anass Benayad,

    1. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
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  • Seon-Mi Yoon,

    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
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  • Hyeon Ki Park,

    1. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
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  • In-Sun Jung,

    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
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  • Mei Hua Jin,

    1. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
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  • Hae-Kyung Jeong,

    1. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
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  • Jong Min Kim,

    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
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  • Jae-Young Choi,

    Corresponding author
    1. Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea)
    • Display Lab, Analytical Engineering Center Samsung Advanced Institute of Technology Yongin, Gyeonggi-do 446-712 (Korea).
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  • Young Hee Lee

    Corresponding author
    1. BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea)
    • BK21 Physics Division Sungkyunkwan Advanced Institute of Nanotechnology Center for Nanotubes and Nanostructured Composites Sungkyunkwan University Suwon, Gyeonggi-do 440-746(Korea).
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Abstract

The conductivity of graphite oxide films is modulated using reducing agents. It is found that the sheet resistance of graphite oxide film reduced using sodium borohydride (NaBH4) is much lower than that of films reduced using hydrazine (N2H4). This is attributed to the formation of C[BOND]N groups in the N2H4 case, which may act as donors compensating the hole carriers in reduced graphite oxide. In the case of NaBH4 reduction, the interlayer distance is first slightly expanded by the formation of intermediate boron oxide complexes and then contracted by the gradual removal of carbonyl and hydroxyl groups along with the boron oxide complexes. The fabricated conducting film comprising a NaBH4-reduced graphite oxide reveals a sheet resistance comparable to that of dispersed graphene.

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