Optical identification of single- and few-layer MoS₂ sheets.

Hai, Li; Gang, Lu; Zongyou, Yin; Qiyuan, He; Hong, Li; Qing, Zhang; Hua, Zhang

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Article . 2012

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Optical identification of single- and few-layer MoS₂ sheets.

descriptionPublicationkeyboard_double_arrow_right Article 16 Jul 2012 English Journal:Small (Weinheim an der Bergstrasse, Germany), volume 8 (issn: 1613-6829,

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Authors: Hai, Li; Gang, Lu; Zongyou, Yin; Qiyuan, He; Hong, Li; Qing, Zhang; Hua, Zhang;

pmid: 22223545

Optical identification of single- and few-layer MoS₂ sheets.

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Abstract

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.

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Nanyang Technological University
Singapore

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