Poly(1H,1H-dihydroperfluorooctyl methacrylate-b-ethyleneoxide)를 이용한 Metal Nanoparticle의 자기조립특성

Abstract

This study has been presented for the preparation of metal nanoparticles with self-assembled and well-ordered Poly(1H,1H-dihydro perfluorooctyl mathacryate-b-ethyleneoxide)(PEO-b-PFOMA) block copo lymer thin films. PEO-b-PFOMA micellar solution with metal precursor LiAuCl4, AgNO3 in chloroform were spin-coated on substrates grid and mica. Then we annealed LiAuCl4,AgNO3 and LiAuCl4 with AgNO3 loaded block copolymeric thin films in supercritical CO2 a t700C or in vacuum oven at 100C˚. After annealing, the morphological structure was inverted to thermodynamically stable morphologies, forming PEO domains and PFOMA phase in the thin films and the LiAuCl4, AgNO3 and LiAuCl4 with AgNO3 ions were forced to follow the morphological change; i.e., they were transformed into to a single particle in each PEO domain. It was observed that the size of metal nanoparticles increased with the increase in the molecular weight of the block copolymers.