Journal
CARBON
Volume 62, Issue -, Pages 312-321Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.05.069
Keywords
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Funding
- National Research Foundation of Korea (NRF) [2009-0083540, 2013R1A2A1A01015232]
- Ministry of Science, ICT & Future Planning, Republic of Korea
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In comparison with mechanically exfoliated graphene (Gr) or chemically driven Gr, the detection of proteins using chemical vapor-deposited (CVD) Gr has been limited due to polymer residues remaining after polymer-mediated transfer of CVD Gr, which hampers the effective immobilization of probe molecules. We attempted to elucidate whether Au-mediated transfer of CVD Gr could facilitate the detection capability of a protein biomarker for cancer by generating a higher-quality Gr surface compared with polymethyl methacrylate (PMMA)-transferred Gr. Au-transferred Gr was investigated using various chemical and electrical analyses, and the results indicated the lack of polymer residue, higher p-doping, and higher channel mobility compared with PMMA-transferred Gr. The cleaner Gr surface of Au-transferred Gr PET significantly enhanced the protein detection sensitivity compared with that of PMMA-transferred Gr PET. (C) 2013 Elsevier Ltd. All rights reserved.
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