We also observed a slight, reversible shift of 2 nm in the position of the Au-2 l-LSPR band without any significant distortions or damping (Figure ). This is a key difference between our material and other literature Azo-plasmonic hybrids, where E-Z isomerization causes nanoparticles aggregation. As a result, hybrids exhibit weakened or even none of the initial plasmonic properties.