Optical visualization of ultrathin mica flakes on semitransparent gold substrates
1 Nanobioelec Group, Institute for BioEngineering of Catalonia (IBEC), c/Baldiri i Reixac 15-21, Barcelona 08028, Spain
2 Departament d’Electrònica, Universitat de Barcelona, c/Martí i Franquès 1, Barcelona 08028, Spain
3 Nanotechnology Platform, Barcelona Science Park, c/Josep Samitier 1-5, Barcelona 08028, Spain
4 Current address: The Walter and Eliza Hall Institute of Medical Research, Parkville, Melbourne 3052, Australia
Nanoscale Research Letters 2013, 8:305 doi:10.1186/1556-276X-8-305Published: 2 July 2013
We show that optical visualization of ultrathin mica flakes on metallic substrates is viable using semitransparent gold as substrates. This enables to easily localize mica flakes and rapidly estimate their thickness directly on gold substrates by conventional optical reflection microscopy. We experimentally demonstrate it by comparing optical images with atomic force microscopy images of mica flakes on semitransparent gold. Present results open the possibility for simple and rapid characterization of thin mica flakes as well as other thin sheets directly on metallic substrates.