Self-Healing Reduced Graphene Oxide Films by Supersonic Kinetic Spraying

Authors
Kim, Do-YeonSinha-Ray, SumanPark, Jung-JaeLee, Jong-GunCha, You-HongBae, Sang-HoonAhn, Jong-HyunJung, Yong ChaeKim, Soo MinYarin, Alexander L.Yoon, Sam S.
Issue Date
2014-08-20
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.24, no.31, pp.4986 - 4995
Abstract
The industrial scale application of graphene and other functional materials in the field of electronics has been limited by inherent defects, and the lack of simple deposition methods. A simple spray deposition method is developed that uses a supersonic air jet for a commercially available reduced graphene oxide (r-GO) suspension. The r-GO flakes are used as received, which are pre-annealed and pre-hydrazine-treated, and do not undergo any post-treatment. A part of the considerable kinetic energy of the r-GO flakes entrained by the supersonic jet is used in stretching the flakes upon impact with the substrate. The resulting "frozen elastic strains" heal the defects (topological defects, namely Stone-Wales defect and C-2 vacancies) in the r-GO flakes, which is reflected in the reduced ratio of the intensities of the D and G bands in the deposited film. The defects can also be regenerated by annealing.
Keywords
RAMAN-SPECTROSCOPY; TRANSPARENT; PHASE; FABRICATION; DEPOSITION; GRAPHITE; DISORDER; ROUTE; RAMAN-SPECTROSCOPY; TRANSPARENT; PHASE; FABRICATION; DEPOSITION; GRAPHITE; DISORDER; ROUTE; kinetic spraying; reduced graphene oxide; self-healing; thin films
ISSN
1616-301X
URI
https://pubs.kist.re.kr/handle/201004/126456
DOI
10.1002/adfm.201400732
Appears in Collections:
KIST Article > 2014
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