COACERVATE STRUCTURES OF CDI2 THIN-FILM GROWN DURING PHASE-TRANSFORMATION

The microstructure of Cdl(2) thin film grown during vapor-phase deposi tion was investigated by scanning electron microscopy (SEM). The thin film deposited on Si crystal consists of numerous sunflower-like aggre gates. These aggregates display well self-assembly characteristics. Th e size of sunflower-like aggregates is between 12 and 44 mu m. Each su nflower-like aggregate is surrounded with many adjacent wings-''petals ''. The structure of central region of the ''sunflower'' is obviously different from that of the ''petal''. Electron spectroscopy for chemic al analysis (ESCA) was employed in determining the chemical valence of the thin film. Self-organization effect is used to explain the coring growth process of Cdl(2) thin film.