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 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.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
Hai
H
Li
Gang
G
Lu
Zongyou
Z
Yin
Qiyuan
Q
He
Hong
H
Li
Qing
Q
Zhang
Hua
H
Zhang