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Real-time characterization using in situ RHEED transmission mode and TEM for investigation of the growth behaviour of nanomaterials

Cited 31 time in Web of Science Cited 32 time in Scopus
Authors

Jo, Janghyun; Tchoe, Youngbin; Yi, Gyu-Chul; Kim, Miyoung

Issue Date
2018-01
Publisher
Nature Publishing Group
Citation
Scientific Reports, Vol.8 No.1, p. 1694
Abstract
A novel characterization technique using both in situ reflection high-energy electron diffraction (RHEED) transmission mode and transmission electron microscopy (TEM) has been developed to investigate the growth behaviour of semiconductor nanostructures. RHEED employed in transmission mode enables the acquisition of structural information during the growth of nanostructures such as nanorods. Such real-time observation allows the investigation of growth mechanisms of various nanomaterials that is not possible with conventional ex situ analytical methods. Additionally, real-time monitoring by RHEED transmission mode offers a complete range of information when coupled with TEM, providing structural and chemical information with excellent spatial resolution, leading to a better understanding of the growth behaviour of nanomaterials. Here, as a representative study using the combined technique, the nucleation and crystallization of InAs nanorods and the epitaxial growth of InxGa1-xAs(GaAs) shell layers on InAs nanorods are explored. The structural changes in the InAs nanorods at the early growth stage caused by the transition of the local growth conditions and the strain relaxation processes that occur during epitaxial coating of the shell layers are shown. This technique advances our understanding of the growth behaviour of various nanomaterials, which allows the realization of nanostructures with novel properties and their application in future electronics and optoelectronics.
ISSN
2045-2322
Language
English
URI
https://hdl.handle.net/10371/149930
DOI
https://doi.org/10.1038/s41598-018-19857-2
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