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TitleEnhancement of graphene visibility on transparent substrates by refractive index optimization
Author(s)Gonçalves, Hugo
Alves, Luis
Moura, C.
Belsley, M.
Stauber, Tobias Pascal
Schellenberg, Peter Michael
Graphene contrast
Graphene absorption
Issue date20-May-2013
PublisherOptical Society of America
JournalOptics Express
Abstract(s)Optical reflection microscopy is one of the main imaging tools to visualize graphene microstructures. Here is reported a novel method that employs refractive index optimization in an optical reflection microscope, which greatly improves the visibility of graphene flakes. To this end, an immersion liquid with a refractive index that is close to that of the glass support is used in-between the microscope lens and the support improving the contrast and resolution of the sample image. Results show that the contrast of single and few layer graphene crystals and structures can be enhanced by a factor of 4 compared to values commonly achieved with transparent substrates using optical reflection microscopy lacking refractive index optimization.
AccessRestricted access (UMinho)
Appears in Collections:CDF - FAMO - Artigos/Papers (with refereeing)

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