Effects of dry oxidation treatments on monolayer graphene

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Title
Effects of dry oxidation treatments on monolayer graphene
Author(s)
Gyeong Hee Ryu; Jongyeong Lee; Dongwoo Kang; Hye Jin Jo; Hyeon Suk Shin; Zonghoon Lee
Publication Date
2017-06
Journal
2D MATERIALS, v.4, no.2, pp.024011 -
Publisher
IOP PUBLISHING LTD
Abstract
Ultraviolet-ozone (UVO) and oxygen plasma are widely used to modify the surface of materials because these processes are facile and accessible. These dry oxidation treatments are also commonly applied to 2D graphene and are presumed to induce similar oxidation effects on the graphene surface. However, in this work, these treatments are revealed to induce the formation of different types of defects on the surface of graphene because the UVO treatment causes a chemical reaction, whereas the oxygen plasma treatment causes both physical and chemical reactions. The oxygen plasma treatment results mainly in topological defects, which effectively induce the attachment of oxygen atoms onto the treated surface; by contrast, the UVO treatment induces only the attachment of oxygen atoms onto the treated surface, without inducing lattice distortion. These results are confirmed mainly by atomic-resolution transmission electron microscopy imaging and electron energy loss spectroscopy. Using such facile dry oxidation treatments, we experimentally modified the surface states of graphene at the atomic scale. © 2017 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/3884
ISSN
2053-1583
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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