a) Schematic representation of the collapse of the end-grafted polymer layer on a Au-NP due to a change in the solvent quality, and the shift in the position of the LSPR peak, Δλcollapse, this collapse induces. b) Effect of the Au-NP core size (R) and the chain length (N) in the change in the position of the LSPR band (Δλcollapse, panel b) and in the average polymer volume fraction of the film upon collapse (Δλcollapse, panel c). Surface density is σ = 0.5 nm−2. Adapted with permission from Tagliazucchi al., ACS Nano, 2012, 6, 8397–8406. Copyright 2012 American Chemical Society.126