Fig. 1From: Optical Properties of Gold Nanoparticle Assemblies on a Glass SurfaceTEM image of dried colloidal solution of AuNP (a).The inset on a is the image of single AnNPs obtained by h-TEM with triangular-like dark/bright regions revealing the presence of facets on the surface AuNP. The optical spectra (b) of AuNP colloidal solution (red solid curve) and of AuNP chemically attached to a glass surface (black dashed curve) by means of (3-aminopropyl)-triethoxysilane (APTES) monolayerBack to article page