Optical Identification of Single- and Few-Layer MoS2 Sheets

A simple approach is developed to identify the layer number of 2D MoS2 sheets. By using an optical imaging method combined with image analysis software, a high‐contrast image of the MoS2 sheets can be extracted from the red (R) channel of the color optical microscopy image. The value of the intensit...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2012-03, Vol.8 (5), p.682-686
Main Authors: Li, Hai, Lu, Gang, Yin, Zongyou, He, Qiyuan, Li, Hong, Zhang, Qing, Zhang, Hua
Format: Article
Language:English
Subjects:
atomic force microscopy
chalcogenides
layered materials
optical imaging
Raman spectroscopy
Online Access:Get full text
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Summary:A simple approach is developed to identify the layer number of 2D MoS2 sheets. By using an optical imaging method combined with image analysis software, a high‐contrast image of the MoS2 sheets can be extracted from the red (R) channel of the color optical microscopy image. The value of the intensity difference in the grayscale image of the R channel between MoS2 sheets (1–3 layers) and the SiO2 substrate can be used to identify the layer number of the sheet.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201101958