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

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 journal › Article

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 language	English
Pages (from-to)	13599-13606
Number of pages	8
Journal	Journal Of Physical Chemistry B
Volume	108
Issue number	36
Publication status	Published - 9 Sep 2004

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

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.",

keywords = "films, atomic-force, images, self-assembled, deposition, thin-films, gold, surfaces, microscopy, growth, polyaniline, polymers, kinetics",

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publisher = "American Chemical Society",

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Influence of solution treatment on the adsorption and morphology of poly(o-methoxyaniline) layer-by-layer films. / De Souza, Nara C.; Silva, Josmary R.; Di Thommazo, Renato; Raposo, Maria; Balogh, Débora T.; Giacometti, José A.; Oliveira, Osvaldo N.

In: Journal Of Physical Chemistry B, Vol. 108, No. 36, 09.09.2004, p. 13599-13606.

Research output: Contribution to journal › Article

TY - JOUR

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AU - De Souza, Nara C.

AU - Silva, Josmary R.

AU - Di Thommazo, Renato

AU - Raposo, Maria

AU - Balogh, Débora T.

AU - Giacometti, José A.

AU - Oliveira, Osvaldo N.

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AB - 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.

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