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Optical Identification of Single‐ and Few‐Layer MoS 2 Sheets
Author(s) -
Li Hai,
Lu Gang,
Yin Zongyou,
He Qiyuan,
Li Hong,
Zhang Qing,
Zhang Hua
Publication year - 2012
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201101958
Subject(s) - materials science , identification (biology) , layer (electronics) , nanotechnology , optoelectronics , biology , botany
A simple approach is developed to identify the layer number of 2D MoS 2 sheets. By using an optical imaging method combined with image analysis software, a high‐contrast image of the MoS 2 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 MoS 2 sheets (1–3 layers) and the SiO 2 substrate can be used to identify the layer number of the sheet.