Influence of solution treatment on the adsorption and morphology of poly(o-methoxyaniline) layer-by-layer films

Nara C. De Souza, Josmary R. Silva, Renato Di Thommazo, Maria Raposo, Débora T. Balogh, José A. Giacometti, Osvaldo N. Oliveira

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

It is shown that the adsorption and morphological properties of layer-by-layer films of poly(o-methoxyaniline) (POMA) alternated with poly(vinyl sulfonic acid) (PVS) are affected dramatically by different treatments of the POMA solutions employed to prepare the films. Whereas the dimension of the globular structures seen by atomic force microscopy increases nonmonotonically during film growth in parent POMA solution, owing to a competition of adsorption/desorption processes, it changes monotonically for the fractionated POMA. The roughness of the latter films depends on the concentration of the solution and saturates at a given size of the scan window. This allowed us to apply scaling laws that indicated a self-affine mechanism for adsorption of the treated POMA.

Original languageEnglish
Pages (from-to)13599-13606
Number of pages8
JournalJournal Of Physical Chemistry B
Volume108
Issue number36
Publication statusPublished - 9 Sep 2004

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