AFM morphological study of electropolymerised polyaniline films modified by surfactant and large anions

Giz, M. Janete; Maranhão, Silvanna Leite de Albuquerque; Torresi, Roberto M.

doi:10.1016/s1388-2481(00)00041-2

Cited by 41 publications

(24 citation statements)

References 16 publications

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“…As previously reported, the faster the polymerization rate, the higher the film roughness [36]. The obtained roughness values were increased among the three P(An-co-ABSA)-0.01 with the following order: P(An-co-OA) > P(An-co-SA) > P(An-co-MA), while for P(An-co-ABSA)-0.05 were increased in the order: P(An-co-SA)>P(An-co-OA)>P(An-co-MA) because the P(An-co-SA)-0.05 film, as not as uniform and dense as the P(An-co-OA)-0.05 film, was rougher.…”

Section: Surface Morphology By Afm Analysissupporting

confidence: 74%

“…5. In all P(An-co-ABSA) copolymers, the formation of globular features (with and/ or without cavities), typical of doped PAn [36,37], can be observed, which had different diameters and different distribution densities and were more dense at the increased polymerization rate.…”

Section: Surface Morphology By Afm Analysismentioning

confidence: 94%

“…It is well known that, at high surfactant concentrations, a sphere to rod transition of micelles is obtained [40,41]. The sphere-rod transitions of micelles guide the growth to nanotubular [36] and microtubular [42] morphologies. For this reason, among the same co-monomer mixtures, more well-defined tubular features were present at both P(An-co-SA) and P(An-co-OA) AFM topographic images of lower An concentration, whereas surfactant concentration (SA or OA) was higher (An:ABSA molar ratio 1:10).…”

Section: Surface Morphology By Afm Analysismentioning

confidence: 99%

See 2 more Smart Citations

Electrodeposition of self-doped copolymers of aniline with aminobenzensulfonic acids on stainless steel. Morphological and electrochemical characterization

Michael

Prochaska

Sazou

2015

J Solid State Electrochem

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Self-doped conducting polyaniline (PAn) films were deposited on passive stainless steel (SS) AISI304 substrates by cyclic potential sweep deposition from aqueous mixed monomer solutions of aniline (An) and different aminobenzenesulfonic acids (2-, 3-or, 4-aminobenzenesulfonic acid, ABSA), without the presence of a supporting electrolyte. Two different An concentrations were examined (0.01 and 0.05 M), while the concentration of each ABSA used was kept constant at 0.

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Section: Surface Morphology By Afm Analysissupporting

confidence: 74%

Section: Surface Morphology By Afm Analysismentioning

confidence: 94%

Section: Surface Morphology By Afm Analysismentioning

confidence: 99%

See 1 more Smart Citation

Electrodeposition of self-doped copolymers of aniline with aminobenzensulfonic acids on stainless steel. Morphological and electrochemical characterization

Michael

Prochaska

Sazou

2015

J Solid State Electrochem

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“…In this study they observed geometrically shaped crystalline islands. Torresi and co-workers have reported ex-situ AFM morphological studies of electropolymerised PANI films modified by surfactant ions like sodium dodecylsulphate (SDS) [8].…”

Section: Introductionmentioning

confidence: 99%

Morphological changes with electrode potential in microtubules and nanowires of Polyaniline: An in-situ EC-AFM study

Singh

Mahajan

Rajwade

et al. 2007

2007 International Workshop on Physics of Semiconductor Devices

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Abstract-Polyaniline (PANI) changes its conformationand conductivity on alteration of its electrochemical state. In the present work, we have studied the morphological changes with electrode potential in microtubules and nanowires of PANI using in-situ electrochemical AFM (EC-AFM). About 15 to 20% change in dimensions was observed on changing the electrochemical state in H 2 SO 4 as the electrolyte. Such changes in microtubules and nanowires of PANI may find useful applications in actuation and sensing.

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“…The characterization of polyaniline (PAni) films prepared electrochemically has shown that the properties of such materials depend on synthesis conditions such as, potential range 1 , solvent nature 2,3 , supporting electrolyte [4][5][6] , substrate 7 , etc. Varela et al 2 performed studies on the ionic exchange phenomena related with PAni in non-aqueous media (propylene carbonate (PC) and acetonitrile) and it was observed that both, cation and anion, contribute to the electroneutralization process, which occurs in the polymeric system.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of polyaniline electrosynthesized in propylene carbonate medium in the presence of di- and trichloroacetic acids

Venâncio¹,

Mattoso²,

Motheo³

2001

J. Braz. Chem. Soc.

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No presente trabalho a caracterização de polianilina eletrosintetizada em meio de carbonato de propileno na presença dos ácidos di-e tricloroacéticos foi realizada usando diferentes técnicas. A resposta eletroquímica por voltametria cíclica mostrou os processos redox devido à formação de polaron e bipolaron e à degradação do polímero. A caracterização usando as espectroscopias no infravermelho e ultravioleta-visível indica que os polímeros estão na forma de sal emeraldina com ânions perclorato incorporados. Os filmes produzidos com ambos os ácidos em carbonato de propileno apresentam morfologia compacta como observado por microscopia eletrônica de varredura. Através de testes de filmes de polianilina produzidos em condições selecionadas em um ambiente correspondente a uma bateria de lítio foi observado que estes apresentam uma eficiência coulômbica elevada promissora para aplicações em baterias.In the present work the characterization of polyaniline electrosynthesized in propylene carbonate medium in the presence of di-and trichloroacetic acids was performed using different techniques. The electrochemical response by cyclic voltammetry showed redox processes due to the formation of polaron and bipolaron and polymer degradation. The characterization by infrared and UVvisible spectroscopies indicated that the polymers are in the emeraldine salt form with perchlorate anions incorporated. The films produced with both acids in propylene carbonate media presented a compact morphology as observed by scanning electron microscopy. By testing the polyaniline film produced in selected conditions in a lithium battery environment it was found that it presents a high coulombic efficiency, promising for battery applications.

show abstract

AFM morphological study of electropolymerised polyaniline films modified by surfactant and large anions

Cited by 41 publications

References 16 publications

Electrodeposition of self-doped copolymers of aniline with aminobenzensulfonic acids on stainless steel. Morphological and electrochemical characterization

Electrodeposition of self-doped copolymers of aniline with aminobenzensulfonic acids on stainless steel. Morphological and electrochemical characterization

Morphological changes with electrode potential in microtubules and nanowires of Polyaniline: An in-situ EC-AFM study

Characteristics of polyaniline electrosynthesized in propylene carbonate medium in the presence of di- and trichloroacetic acids

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