STEM Image Analysis Based on Deep Learning: Identification of Vacancy Defects and Polymorphs of MoS2
- Authors
- kihyun Lee; JINSUB PARK; Choi Soyeon; YANGJIN LEE; 이솔; Jung Joowon; Lee Jong-Young; Ullah Farman; Tahir Zeeshan; Kim Yong Soo; Lee Gwan-Hyoung; KWANPYO KIM
- Issue Date
- Jun-2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Deep learning; TEM image analysis; Molybdenum disulfide; Defect; Polymorph
- Citation
- NANO LETTERS, v.22, no.12, pp 4,677 - 4,685
- Journal Title
- NANO LETTERS
- Volume
- 22
- Number
- 12
- Start Page
- 4,677
- End Page
- 4,685
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6303
- DOI
- 10.1021/acs.nanolett.2c00550
- ISSN
- 1530-6984
- 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.
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Collections - College of Science > Physics > 1. Journal Articles
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