TY - JOUR
T1 - Effects of substrate and transfer on CVD-grown graphene over sapphire-induced Cu films
AU - Hu, Baoshan
AU - Wei, Zidong
AU - Ago, Hiroki
AU - Jin, Yan
AU - Xia, Meirong
AU - Luo, Zhengtang
AU - Pan, Qingjiang
AU - Liu, Yunling
N1 - Funding Information:
This work was financially supported by the National Basic Research Program of China (2012CB215500), the National Natural Science Foundation of China (51272296), the Natural Science Foundation of Chongqing (CSTC2012jjA50014), and Fundamental Research Funds for the Central Universities (CDJZR12225501, CQDXWL-2013-016).
PY - 2014/6
Y1 - 2014/6
N2 - 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.
AB - 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.
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U2 - 10.1007/s11426-014-5073-3
DO - 10.1007/s11426-014-5073-3
M3 - Article
AN - SCOPUS:84902292205
SN - 1674-7291
VL - 57
SP - 895
EP - 901
JO - Science China Chemistry
JF - Science China Chemistry
IS - 6
ER -