Nanocrystalline films of poly(phthalocyaninatosiloxane) and HREM studies on them

The vapor of monomer, Si(Pc)(OH)(2), is deposited onto the (100) face of Na Cl single crystal which is heated at 350 degreesC under a dynamic vacuum of 10(-3) Pa. Epitaxial crystallization occurs on the substrate, and condensa tion polymerization takes place in situ at the same time. The resulting pro duct is a kind of nanocrystalline film of [Si(Pc)O](n) that is composed of crystalline grains with a size of about 10 nm and a lot of defect regions w ithout thermal energy stored in them, which differs from semi-crystalline p olymers. The high-resolution electron microscope observations indicate that the nanocrystalline films of the polymer have something in common compared with nano-metals. (C) 2001 Elsevier Science Ltd. All rights reserved.