Study of swelling-induced surface instabilty in crosslinked nanocrystal films
발표자
()
초록
내용
A unique organic–inorganic hybrid network composed of inorganic nanocores (ranging from semiconductors to metallic ones) interconnected through organic molecules can be produced by crosslinking the organic ligands of colloidal inorganic nanocrystals in assemblies. We report that this network, which is conventionally considered an inorganic film, can swell when exposed to a solvent because of the interaction between the solvent and the organic linkage within the network. Intriguingly, we discover that drying the solvent of the swollen organic–inorganic hybrid network can significantly affect the morphology owing to the swelling-induced compress stress, which has been widely observed in various organic network systems. Specifically, we investigated the effects of the i) solvent–network interaction, ii) crosslinking density of the network, and iii) thickness of the film on the delamination behavior of the crosslinked network.