Kim, Yena Kim, Hyeongkeun Kim, Tae Young Rhyu, Se Hyun Choi, Dong Soo Park, Won Kyu Yang, Cheol-Min Yoon, Dae Ho Yang, Woo Seok 2024-01-20T08:02:21Z 2024-01-20T08:02:21Z 2021-09-05 2015-01 0008-6223 https://pubs.kist.re.kr/handle/201004/125914 It has become critically important to develop reliable method to transfer chemical vapor deposited (CVD) graphene from its growth substrate to the target substrate without leaving undesired polymer residues on the graphene surface. Here, we have found that for the two different transfer method - wet transfer using poly(methyl methacrylate) (PMMA) and dry transfer using polydimethylsiloxane (PDMS) as support layer, the amount of polymer residues and other impurities left on the graphene surface varies depending on the solvent used to remove those polymers. The exposure of the graphenes to different organic solvents such as acetone and chloroform resulted in different amount of polymer residues and impurities present on the graphene surface, which impact the electronic structure of the transferred graphene. It was found that the graphene obtained using the dry transfer method and acetone as solvent with a 2D to G (I-2D/I-G) intensity ratio of 4.58 and a 2D peak full width-half maximum (FWHM) of 24.66, which was higher than that using the wet transfer method and chloroform as solvent. These results showed that graphene was less affected by the polymer residues and impurities or the dry transfer method rather than the wet transfer method. In addition, using acetone rather than chloroform as solvent in the dry transfer method led to less contaminated graphene. (C) 2014 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD FILMS Influence of the transfer and chemical treatment of monolayer graphene grown for flexible transparent electrodes Article 10.1016/j.carbon.2014.09.078 1 CARBON, v.81, pp.458 - 464 CARBON 81 458 464 scie scopus 000345682900050 2-s2.0-84922832110 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article FILMS Graphene Flexible Transparent Electrode