Evaluating the interplay of average Au NP density, ρ, and local clustering on the ensemble-averaged plasmon resonance wavelength, λplas, through GMT simulations. Four different 40 nm NP organization levels were considered for different ρ values: a) random, b) 50% dimers, c) 50% trimers, d) 50% random clusters. e) Peaks resonance wavelength as function of ρ and NP organization. Adapted with permission from Wang et al., Nano Lett.
12, 3231 (2012). Copyright 2012 American Chemical Society.