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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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Atomic Arrangements of Graphene-like ZnO

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Title
Atomic Arrangements of Graphene-like ZnO
Author
Yoon, Jong ChanLee, ZonghoonRyu, Gyeong Hee
Issue Date
2021-07
Publisher
MDPI
Citation
NANOMATERIALS, v.11, no.7, pp.1833
Abstract
ZnO, which can exist in various dimensions such as bulk, thin films, nanorods, and quantum dots, has interesting physical properties depending on its dimensional structures. When a typical bulk wurtzite ZnO structure is thinned to an atomic level, it is converted into a hexagonal ZnO layer such as layered graphene. In this study, we report the atomic arrangement and structural merging behavior of graphene-like ZnO nanosheets transferred onto a monolayer graphene using aberration-corrected TEM. In the region to which an electron beam is continuously irradiated, it is confirmed that there is a directional tendency, which is that small-patched ZnO flakes are not only merging but also forming atomic migration of Zn and O atoms. This study suggests atomic alignments and rearrangements of the graphene-like ZnO, which are not considered in the wurtzite ZnO structure. In addition, this study also presents a new perspective on the atomic behavior when a bulk crystal structure, which is not an original layered structure, is converted into an atomic-thick layered two-dimensional structure.
URI
https://scholarworks.unist.ac.kr/handle/201301/53422
URL
https://www.mdpi.com/2079-4991/11/7/1833
DOI
10.3390/nano11071833
ISSN
2079-4991
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