Optical identification of atomically thin dichalcogenide crystals

By A. Castellanos-Gómez, N. Agrait, G. Rubio‐Bollinger. 2010

319 citations recorded by the source corpus.

We present a systematic study of the optical contrast of niobium diselenide and molybdenum disulfide flakes deposited onto silicon wafers with a thermally grown silicon oxide layer. We measure the optical contrast of flakes whose thickness, which is obtained by atomic force microscopy, ranges from 200 layers down to a monolayer using different illumination wavelengths in the visible spectrum. The refractive index of these thin crystals has been obtained from the optical contrast using Fresnel law. In this way the optical microscopy data can be quantitatively analyzed to determine the thickness of the flakes in a fast and nondestructive way.

Subfields: Biomedical Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/9322e68814f2a4ed5c27782c80f785e1de8bf610

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In Biomedical Engineering

In Materials Chemistry

Citations in the corpus

Mechanics of freely‐suspended ultrathin layered materials (2014, background): “several works that provide protocols to optimize the optical contrast and to optically determine the number of layers of many 2D materials: 4 graphene [18, 19, 20, 21, 22], graphene oxide [23], MoS 2 [24, 25, 26], NbSe 2 [24, 27], WSe 2 [26, 27], TaS 2 [26], TaSe 2 [28], mica [29, 30], etc. As an ex”
Sensitivity Improved SPR Biosensor Based on the MoS2/Graphene–Aluminum Hybrid Structure (2017, unknown): “from the experimental measurement [33].”
Production and processing of graphene and related materials (2020, background): “10 compares different optical microscopy characterization methods, studying the same system: multi-spectral, hyper-spectral and micro transmittance of 1-3L-MoS2 [1421, 1431, 1434].”