Electrostatic self-assembly layer-by-layer film fabrication using a polycation and a phthalocyanine dye anion

A multi-layer film has been fabricated, using poly(diallyldimethylammonium chloride) (PDDAC) and a copper phthalocyanine (CuPc) dye, held together by electrostatic forces and layer-by-layer self-assembly attractions. The result of the multi-layer fabrication was characterized by UV-vis absorbance measurements and Atomic Force Microscopy (AFM). UV-vis absorption spectra of the multi-layer films increased linearly at 676 nm, which indicated that the fabrication proceeded regularly. The AFM images show that the surface of the self-assembled multi-layer was thickly covered with PDDAC/CuPc and relatively uniform. Copyright (c) 2006 Society of Porphyrins & Phthalocyanines.