Rayleigh imaging of graphene and graphene layers.

By Cinzia Casiraghi, A. Hartschuh, E. Lidorikis, H. Qian, H. Harutyunyan, T. Gokus, K. Novoselov, Andrea C. Ferrari. Nano letters (Print), 2007

637 citations recorded by the source corpus.

We investigate graphene and graphene layers on different substrates by monochromatic and white-light confocal Rayleigh scattering microscopy. The image contrast depends sensitively on the dielectric properties of the sample as well as the substrate geometry and can be described quantitatively using the complex refractive index of bulk graphite. For a few layers (<6), the monochromatic contrast increases linearly with thickness. The data can be adequately understood by considering the samples behaving as a superposition of single sheets that act as independent two-dimensional electron gases. Thus, Rayleigh imaging is a general, simple, and quick tool to identify graphene layers, which is readily combined with Raman scattering, that provides structural identification.

Subfields: Biomedical Engineering, Materials Chemistry, Structural Biology

View Paper: https://www.semanticscholar.org/paper/0adb1077a7b49fe0704e499d3b79bfa9a28baab3

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Citations in the corpus

Graphene Photonics and Optoelectroncs (2010, background): “For example, it can be optically visualized, despite being only a single atom thic”
The shear mode of multilayer graphene. (2011, background): “The number of layers and their stacking are identified by a combination of 2D peak Raman spectroscopy[13, 7] and optical contrast on the supported section of the flake[23, 24].”
Strong plasmonic enhancement of photovoltage in graphene. (2011, background): “The single-layer nature of our flakes was confirmed by a combination of optical contras”
Mechanics of freely‐suspended ultrathin layered materials (2014, background): “” Annalen der Physik, (2015) Vol.527, Iss. 1-2, 27–44. doi: 10.1002/andp.201400153 Which has been published in final form at: http://onlinelibrary.wiley.com/doi/10.1002/andp.201400153/full 4 graphene [18, 19, 20, 21, 22], graphene oxide [23], MoS 2 [24, 25, 26], NbSe 2 [24, 27], WSe 2 [26, 27], TaS ”
Synthesis of graphene (2016, background): “Single-layer graphene has an absorption rate of 2 %, nevertheless it is possible to see it under a light microscope on SiO2/Si, due to interference effects [75].”
Dirac electronic states in graphene systems: optical spectroscopy studies (2010, background): “As more recently revealed in details [37, 38, 39, 40, 41], the choice of the appropriate thickness of the SiO2 layer plays the essential role in the visualization of the graphene layers.”
The effect of the substrate on the Raman and photoluminescence emission of single-layer MoS2 (2013, background): “Note that this approximation is well proven to capture the main experimental features [33, 34].”