Spectroscopic and microscopic measurements show that 10,12-pentacosadiynoic acid is able to densely
adsorb on the surface of silver nanoparticles by properly selecting the synthesis procedure. Its subsequent
polymerization by UV irradiation under controlled photochemical conditions produces the blue form of
poly(pentacosa-10,12-diynoic acid). The resulting nanohybrids are very stable in aqueous suspension and
exhibit a bilayered, core–shell architecture. We propose a model of the polyPCDA self-assembled on silver
nanoparticles and we evaluate the surface coverage density.