Fig. 2From: Distance-Dependent Plasmon-Enhanced Fluorescence of Submonolayer Rhodamine 6G by Gold NanoparticlesTypical AFM images of Au NPs/glass (a) and PMMA/Au NPs/glass (b). Surface profile of PMMA films with concentrations of 0.03wt% (c), 0.1wt% (d) and 0.4wt% (e). f UV–Vis absorption spectra of the NPs without PMMA (black) and with 1.5-nm (red), 6.5-nm (blue) and 21-nm (orange) PMMA separation layerBack to article page