PMID- 27482811 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180718 LR - 20180718 IS - 1361-6528 (Electronic) IS - 0957-4484 (Linking) VI - 27 IP - 36 DP - 2016 Sep 9 TI - Direct transfer of multilayer graphene grown on a rough metal surface using PDMS adhesion engineering. PG - 365705 LID - 10.1088/0957-4484/27/36/365705 [doi] AB - The direct transfer of graphene using polydimethylsiloxane (PDMS) stamping has advantages such as a 'pick-and-place' capability and no chemical residue problems. However, it is not easy to apply direct PDMS stamping to graphene grown via chemical vapor deposition on rough, grainy metal surfaces due to poor contact between the PDMS and graphene. In this study, graphene consisting of a mixture of monolayers and multiple layers grown on a rough Ni surface was directly transferred without the use of an adhesive layer. Liquid PDMS was cured on graphene to effect a conformal contact with the graphene. A fast release of graphene from substrate was achieved by carrying out wet-etching-assisted mechanical peeling. We also carried out a thermal post-curing of PDMS to control the level of adhesion between PDMS and graphene and hence facilitate a damage-free release of the graphene. Characterization of the transferred graphene by micro-Raman spectroscopy, SEM/EDS and optical microscopy showed neither cracks nor contamination from the transfer. This technique allows a fast and simple transfer of graphene, even for multilayer graphene grown on a rough surface. FAU - Jang, Heejun AU - Jang H AD - Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. KAIST Institute for the Nanocentury, Daejeon 34141, Korea. FAU - Kang, Il-Suk AU - Kang IS FAU - Lee, Youngbok AU - Lee Y FAU - Cha, Yun Jeong AU - Cha YJ FAU - Yoon, Dong Ki AU - Yoon DK FAU - Ahn, Chi Won AU - Ahn CW FAU - Lee, Wonhee AU - Lee W LA - eng PT - Journal Article DEP - 20160802 PL - England TA - Nanotechnology JT - Nanotechnology JID - 101241272 EDAT- 2016/08/03 06:00 MHDA- 2016/08/03 06:01 CRDT- 2016/08/03 06:00 PHST- 2016/08/03 06:00 [entrez] PHST- 2016/08/03 06:00 [pubmed] PHST- 2016/08/03 06:01 [medline] AID - 10.1088/0957-4484/27/36/365705 [doi] PST - ppublish SO - Nanotechnology. 2016 Sep 9;27(36):365705. doi: 10.1088/0957-4484/27/36/365705. Epub 2016 Aug 2.