We have transferred CVD-grown graphene onto SiO2. Atomic force microscopy revealed that the surface is characterized by folds, whose height may reach several nm. Onto such surface we have evaporated pentacene. Preferential nucleation has been observed at the sites of fold intersection.
COBISS.SI-ID: 2603515
The optical absorption of graphene was obtained from spectroscopic ellipsometry in the visible and ultraviolet range. Measured spectra were analyzed by optical models based on the Fresnel coefficients. The optical models were supported by Raman, scanning electron microscopy, and atomic force microscopy measurements. Our results show that a residue layer left on graphene can significantly increase its optical absorption in the visible range.
COBISS.SI-ID: 2864123