期刊
NANOTECHNOLOGY
卷 26, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/5/055302
关键词
transfer; graphene; polymers; contaminants; chemical vapor deposition; layering
资金
- US Office of Naval Research (ONR) [N00014-13-1-0300]
- National Science Foundation (NSF) [CHE 10-38015]
- National Defense Science and Engineering Graduate Fellowship (NDSEG) through the Army Research Office (ARO)
- Beckman Foundation
- Naval Research Enterprise Intern Program (NREIP)
We examine the transfer of graphene grown by chemical vapor deposition (CVD) with polymer scaffolds of poly(methyl methacrylate) (PMMA), poly(lactic acid) (PLA), poly(phthalaldehyde) (PPA), and poly(bisphenol A carbonate) (PC). We find that optimally reactive PC scaffolds provide the cleanest graphene transfers without any annealing, after extensive comparison with optical microscopy, x-ray photoelectron spectroscopy, atomic force microscopy, and scanning tunneling microscopy. Comparatively, films transferred with PLA, PPA, PMMA/PC, and PMMA have a two-fold higher roughness and a five-fold higher chemical doping. Using PC scaffolds, we demonstrate the clean transfer of CVD multilayer graphene, fluorinated graphene, and hexagonal boron nitride. Our annealing free, PC transfers enable the use of atomically-clean nanomaterials in biomolecule encapsulation and flexible electronic applications.
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