English  |  正體中文  |  简体中文  |  Items with full text/Total items : 49521/84606 (59%)
Visitors : 7579385      Online Users : 65
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/104614


    Title: Visualizing chemical states and defects induced magnetism of graphene oxide by spatially-resolved-X-ray microscopy and spectroscopy
    Authors: Wang, Y. F.;Singh, Shashi B.;Limaye, Mukta V.;Shao, Y. C.;Hsieh, S.H.;Chen, L.Y.;薛宏中;Hsueh, H. C.;Wang, H. T.;Chiou, J. W.;Yeh, Y. C.;Chen, C.W.;Chen, C. H.;Ray, Sekhar C.;Wang, J.;Pong, W. F.;Y. Takagi;T. Ohigashi;T. Yokoyama;N. Kosugi
    Date: 2015-10-20
    Issue Date: 2016-01-06 11:04:50 (UTC+8)
    Abstract: This investigation studies the various magnetic behaviors of graphene oxide (GO) and reduced
    graphene oxides (rGOs) and elucidates the relationship between the chemical states that involve
    defects therein and their magnetic behaviors in GO sheets. Magnetic hysteresis loop reveals that the
    GO is ferromagnetic whereas photo-thermal moderately reduced graphene oxide (M-rGO) and heavily
    reduced graphene oxide (H-rGO) gradually become paramagnetic behavior at room temperature.
    Scanning transmission X-ray microscopy and corresponding X-ray absorption near-edge structure
    spectroscopy were utilized to investigate thoroughly the variation of the C 2p(π*) states that are
    bound with oxygen-containing and hydroxyl groups, as well as the C 2p(σ*)-derived states in flat
    and wrinkle regions to clarify the relationship between the spatially-resolved chemical states and
    the magnetism of GO, M-rGO and H-rGO. The results of X-ray magnetic circular dichroism further
    support the finding that C 2p(σ*)-derived states are the main origin of the magnetism of GO. Based
    on experimental results and first-principles calculations, the variation in magnetic behavior from GO
    to M-rGO and to H-rGO is interpreted, and the origin of ferromagnetism is identified as the C 2p(σ*)-
    derived states that involve defects/vacancies rather than the C 2p(π*) states that are bound with
    oxygen-containing and hydroxyl groups on GO sheets.
    Relation: Scientific Reports 5, pp.15439
    DOI: 10.1038/srep15439
    Appears in Collections:[物理學系暨研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML141View/Open
    Visualizing chemical states and defects induced magnetism of graphene oxide by spatially-resolved-X-ray microscopy and spectroscopy.pdf1950KbAdobe PDF35View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback