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STEM Image Analysis Based on Deep Learning: Identification of Vacancy Defects and Polymorphs of MoS2

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Title
STEM Image Analysis Based on Deep Learning: Identification of Vacancy Defects and Polymorphs of MoS2
Author(s)
Kihyun Lee; Jinsub Park; Soyeon Choi; Yangjin Lee; Sol Lee; Joowon Jung; Jong-Young Lee; Farman Ullah; Zeeshan Tahir; Yong Soo Kim; Gwan-Hyoung Lee; Kwanpyo Kim
Publication Date
2022-06
Journal
Nano letters, v.22, no.12, pp.4677 - 4685
Publisher
NLM (Medline)
Abstract
Scanning transmission electron microscopy (STEM) is an indispensable tool for atomic-resolution structural analysis for a wide range of materials. The conventional analysis of STEM images is an extensive hands-on process, which limits efficient handling of high-throughput data. Here, we apply a fully convolutional network (FCN) for identification of important structural features of two-dimensional crystals. ResUNet, a type of FCN, is utilized in identifying sulfur vacancies and polymorph types of MoS2 from atomic resolution STEM images. Efficient models are achieved based on training with simulated images in the presence of different levels of noise, aberrations, and carbon contamination. The accuracy of the FCN models toward extensive experimental STEM images is comparable to that of careful hands-on analysis. Our work provides a guideline on best practices to train a deep learning model for STEM image analysis and demonstrates FCN's application for efficient processing of a large volume of STEM data.
URI
https://pr.ibs.re.kr/handle/8788114/12032
DOI
10.1021/acs.nanolett.2c00550
ISSN
1530-6984
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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