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Chemical structures of hydrazine-treated graphene oxide and generation of aromatic nitrogen doping

Author

Listed:
  • Sungjin Park

    (Inha University)

  • Yichen Hu

    (University of Illinois at Chicago)

  • Jin Ok Hwang

    (KAIST, Daejeon 305-701, Korea.)

  • Eui-Sup Lee

    (Graduate School of Nanoscience and Technology (WCU) and KAIST Institute for the NanoCentury, KAIST)

  • Leah B. Casabianca

    (University of Illinois at Chicago)

  • Weiwei Cai

    (University of Texas at Austin, One University Station C2200)

  • Jeffrey R. Potts

    (University of Texas at Austin, One University Station C2200)

  • Hyung-Wook Ha

    (University of Texas at Austin, One University Station C2200)

  • Shanshan Chen

    (University of Texas at Austin, One University Station C2200)

  • Junghoon Oh

    (Inha University)

  • Sang Ouk Kim

    (KAIST, Daejeon 305-701, Korea.)

  • Yong-Hyun Kim

    (Graduate School of Nanoscience and Technology (WCU) and KAIST Institute for the NanoCentury, KAIST)

  • Yoshitaka Ishii

    (University of Illinois at Chicago
    Center for Structural Biology, University of Illinois at Chicago)

  • Rodney S. Ruoff

    (University of Texas at Austin, One University Station C2200)

Abstract

Chemically modified graphene platelets, produced via graphene oxide, show great promise in a variety of applications due to their electrical, thermal, barrier and mechanical properties. Understanding the chemical structures of chemically modified graphene platelets will aid in the understanding of their physical properties and facilitate development of chemically modified graphene platelet chemistry. Here we use 13C and 15N solid-state nuclear magnetic resonance spectroscopy and X-ray photoelectron spectroscopy to study the chemical structure of 15N-labelled hydrazine-treated 13C-labelled graphite oxide and unlabelled hydrazine-treated graphene oxide, respectively. These experiments suggest that hydrazine treatment of graphene oxide causes insertion of an aromatic N2 moiety in a five-membered ring at the platelet edges and also restores graphitic networks on the basal planes. Furthermore, density-functional theory calculations support the formation of such N2 structures at the edges and help to elucidate the influence of the aromatic N2 moieties on the electronic structure of chemically modified graphene platelets.

Suggested Citation

  • Sungjin Park & Yichen Hu & Jin Ok Hwang & Eui-Sup Lee & Leah B. Casabianca & Weiwei Cai & Jeffrey R. Potts & Hyung-Wook Ha & Shanshan Chen & Junghoon Oh & Sang Ouk Kim & Yong-Hyun Kim & Yoshitaka Ishi, 2012. "Chemical structures of hydrazine-treated graphene oxide and generation of aromatic nitrogen doping," Nature Communications, Nature, vol. 3(1), pages 1-8, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1643
    DOI: 10.1038/ncomms1643
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