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Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

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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
Son, SeungwooCho, YeonchooHong, Hyo-KiLee, JongyeongKim, Jung HwaKim, KangsikLee, YeongdongYoon, AramShin, Hyeon-JinLee, Zonghoon
Issue Date
2020-12
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.12, no.48, pp.54222 - 54229
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://scholarworks.unist.ac.kr/handle/201301/49284
URL
https://pubs.acs.org/doi/10.1021/acsami.0c18291
DOI
10.1021/acsami.0c18291
ISSN
1944-8244
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