Effects of substrate and transfer on CVD-grown graphene over sapphire-induced Cu films

Baoshan Hu, Zidong Wei, Hiroki Ago, Yan Jin, Meirong Xia, Zhengtang Luo, Qingjiang Pan, Yunling Liu

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    We differentiated the effects of Cu films deposited on single crystalline a-, r-, and c-plane sapphire substrates upon graphene films synthesized with atmospheric pressure chemical vapor deposition (CVD). The data illustrate that the realization of high-crystalline Cu film is dependent not only on the crystallinity of underlying substrate, but also on the symmetric match of crystallographic geometry between metal film and substrate. We also systematically investigated the effects of PMMA removal on the Raman I D/I G and I G/I 2D values of transferred graphene. The results reveal that different PMMA removal methods do not alter the I D/I G values; instead, the residue of PMMA increases the I G/I 2D values and the thermal decomposition of PMMA leads to higher I G/I 2D values than the removal of PMMA with acetone. The effects of PMMA removal on variations of the Raman spectra are also discussed.

    Original languageEnglish
    Pages (from-to)895-901
    Number of pages7
    JournalScience China Chemistry
    Volume57
    Issue number6
    DOIs
    Publication statusPublished - Jun 2014

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)

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