Počet záznamů: 1

Surface refinement and electronic properties of graphene layers grown on copper substrate: An XPS, UPS and EELS study

  1. 1.
    0362878 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Siokou, A. - Ravani, F. - Karakalos, S. - Frank, Otakar - Kalbáč, Martin - Galiotis, C.
    Surface refinement and electronic properties of graphene layers grown on copper substrate: An XPS, UPS and EELS study.
    Applied Surface Science. Roč. 257, č. 23 (2011), s. 9785-9790 ISSN 0169-4332
    Grant CEP: GA MŠk LC510; GA AV ČR IAA400400911
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: graphene * XPS * EELS
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 2.103, rok: 2011

    The present work focuses on the assessment of two surface treatment procedures employed under ultra high vacuum conditions in order to obtain atomically clean graphene layers without disrupting the morphology and the two dimensional character of the films. Graphene layers grown by chemical vapor deposition on polycrystalline Cu were stepwise annealed up to 750 °C or treated by mild Ar+ sputtering. The effectiveness of both methods and the changes that they induce on the surface morphology and electronic structure of the films were systematically studied by X-ray photoelectron spectroscopy, and electron energy loss spectroscopy. Ultraviolet photoelectron spectroscopy was employed for the study of the electronic properties of the as received sample and in combination with the work function measurements, indicated the hybridization of the C–π network with Cu d-orbitals. Mild Ar+ sputtering sessions were found to disrupt the sp2 network and cause amorphisation of the graphitic carbon.
    Trvalý link: http://hdl.handle.net/11104/0006521