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Title

Optical contrast and refractive index of natural van der Waals heterostructure nanosheets of franckeite

AuthorsGant, Patricia; Ghasemi, Foad; Maeso, David; Munuera, C. ; López-Elvira, Elena; Frisenda, Riccardo; Lara, David Pérez de; Rubio-Bollinger, Gabino; García-Hernández, M. ; Castellanos-Gómez, Andrés
KeywordsFranckeite
Optical contrast
Optical identification
Van der Waals heterostructure
Complex refractive index
Issue Date8-Nov-2017
PublisherBeilstein Institut
CitationBeilstein Journal of Nanotechnology 8: 2357-2362 (2017)
AbstractWe study mechanically exfoliated nanosheets of franckeite by quantitative optical microscopy. The analysis of transmission-mode and epi-illumination-mode optical microscopy images provides a rapid method to estimate the thickness of the exfoliated flakes at first glance. A quantitative analysis of the optical contrast spectra by means of micro-reflectance allows one to determine the refractive index of franckeite over a broad range of the visible spectrum through a fit of the acquired spectra to a model based on the Fresnel law.
Publisher version (URL)http://doi.org/10.3762/bjnano.8.235
URIhttp://hdl.handle.net/10261/188212
Identifiersdoi: 10.3762/bjnano.8.235
issn: 2190-4286
e-issn: 2190-4286
Appears in Collections:(ICMM) Artículos
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