Micro energy dispersive x-ray fluorescence as a powerful complementary technique for the analysis of bimetallic Au/Ag/glass nanolayer composites used in surface plasmon resonance sensors.

It is demonstrated that any theoretical analysis of experimental surface plasmon resonance (SPR) curves of metallic nano bilayers preferably should be accompanied by a more sensitive technique that is less prone to experimental errors. Micro energy dispersive x-ray fluorescence has been shown to be a powerful technique for predicting SPR angle and assessing Au/Ag nanolayer composite spatial homogeneity.