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Spontaneous Formation of a ZnO Monolayer by the Redox Reaction of Zn on Graphene Oxide

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Title
Spontaneous Formation of a ZnO Monolayer by the Redox Reaction of Zn on Graphene Oxide
Author(s)
Seungwoo Son; Yeonchoo Cho; Hyo-Ki Hong; Jongyeong Lee; Jung Hwa Kim; Kangsik Kim; Yeongdong Lee; Aram Yoon; Hyeon-Jin Shin; Zonghoon Lee
Publication Date
2020-12-02
Journal
ACS APPLIED MATERIALS & INTERFACES, v.12, no.48, pp.54222 - 54229
Publisher
AMER CHEMICAL SOC
Abstract
Graphene-based two-dimensional heterostructures are of substantial interest both for fundamental studies and their various potential applications. Particularly interesting are atomically thin semiconducting oxides on graphene, which uniquely combine a wide band gap and optical transparency. Her; we report the atomic-scale investigation of a novel self-formation of a ZnO monolayer from the Zn metal on a graphene oxide substrate. The spontaneous oxidation of the ultrathin Zn metal occurs by a reaction with oxygen supplied from the graphene oxide substrate, and graphene oxide is deoxygenated by a transfer of oxygen from O-containing functional groups to the zinc metal. The ZnO monolayer formed by this spontaneous redox reaction shows a graphene-like structure and a band gap of about 4 eV. This study demonstrates a unique and straightforward synthetic route to atomically thin two-dimensional heterostructures made from a two-dimensional metal oxide and graphene, formed by the spontaneous redox reaction of a very thin metal layer directly deposited on graphene oxide.
URI
https://pr.ibs.re.kr/handle/8788114/8925
DOI
10.1021/acsami.0c18291
ISSN
1944-8244
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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