NUCLEATION AND GROWTH OF POLY(3-METHYLTHIOPHENE) ON INDIUM TIN OXIDE GLASS BY SCANNING TUNNELING MICROSCOPY



: LUKKARI J, ALANKO M, HEIKKILA L, LAIHO R, KANKARE J

Publisher: AMER CHEMICAL SOC

: 1993

: Chemistry of Materials

: CHEMISTRY OF MATERIALS

: CHEM MATER

: 5

: 3

: 289

: 296

: 8

: 0897-4756

DOI: https://doi.org/10.1021/cm00027a010


We report here results of a scanning tunneling microscopy (STM) and photogalvanic study of the nucleation and growth of poly(3-methylthiophene) on indium-tin oxide (ITO) electrodes. ITO itself exhibits an irregular surface structure consisting of grains with dimensions of 0.1-0.3 mum, separated by deep recesses. Polymer growth begins as oligomer islets on top of the grains and proceeds to form a thin film. Several polymeric features, like fibrils and large featureless bundles, can be detected during later stages of polymerization. Finally macroscopic growth centers appear on the surface and their evolution determines the structure of a thick film.



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