Nucleation and growth mechanisms during electropolymerization of substituted 3-alkylthiophenes

Soto, Juan; Díaz, F. R.; Valle, M.; Vélez, J. H.; East, Gastón A.

doi:10.1016/j.apsusc.2007.11.052

Cited by 28 publications

(20 citation statements)

References 21 publications

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“…Potentiostatic i-t transient experiment is mainly used for kinetic and mechanistic investigation. Nucleation and growth mechanisms of electropolymerization of thiophene [33][34][35][36], aniline [37][38][39], and pyrrole [40] have been investigated by using potentiostatic i-t transient technique. However, the nucleation and growth mechanism for the formation poly(MB) has not been studied until now.…”

Section: Introductionmentioning

confidence: 99%

Nucleation and Growth Mechanism of Electropolymerization of Methylene Blue: The Effect of Preparation Potential on Poly(methylene blue) Structure

2010

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Nucleation and growth mechanism of electropolymerization of methylene blue (MB) in a basic medium and the effect of preparation potential on poly(MB) film structure were investigated by using cyclic voltammetry, potentiostatic current-time transient, scanning tunneling microscopy (STM), atomic force microscopy (AFM), and UV-vis. absorption spectroscopy techniques. Electropolymerization of MB has been achieved by potentiodynamic (cyclic voltammetry) and potentiostatic (constant potential) techniques. The potentiostatic current-time transients fitted with a theoretical model and morphological studies indicate that nucleation and growth mechanism of poly(MB) starts with a progressive layer-by-layer nucleation and growth besides random adsorption. Nucleation and growth of poly(MB) follows a process between progressive layer-by-layer and 3-D instantaneous mechanism resulting in highly-oriented poly(MB) nanofibers with increasing poly(MB) film thickness. Cyclic voltammetry and morphological studies exhibit that poly(MB) film structure changes depending on the preparation potential. Poly(MB) films prepared at the potential values of 900 and 950 mV show a well-ordered, smooth surface but at the potential values higher than 1000 mV, rough polymer surface arises as overoxidation takes place. UV-vis. absorption spectra of poly(MB) film and MB monomer show three peaks. The peak at 410 nm for poly(MB) shows 100 nm blue shift when compared to the MB monomer and is attributed to poly(MB) formation on the electrode.

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Section: Introductionmentioning

confidence: 99%

Nucleation and Growth Mechanism of Electropolymerization of Methylene Blue: The Effect of Preparation Potential on Poly(methylene blue) Structure

2010

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“…Therefore, a deep investigation on the polymer film formation mechanism may provide useful information to researchers. Up to now, nucleation and growth mechanism of electropolymerization of some species e. g. aniline, pyrrole, thiophene, MB, AA, and TH have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Formation Mechanism of Polymeric Thin Films of Azure B on Gold Electrodes

Bayındır

Alanyalıoğlu

2018

ChemistrySelect

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Phenothiazine derivative dyes are preferred as the main material for the formation of nanocomposites because of their electrocatalytic activity, good interaction with many materials, and easy electropolymerized film formation. Therefore, the formation mechanism of polymer thin films needs to be investigated by using both theoretical models and advanced spectroscopic techniques. Electropolymerization of azure B (AB) is supplied by both cyclic voltammetry and chronoamperometry. Some parameters have been questioned for the formation of poly(AB) thin films. Nucleation and growth mechanism of electropolymerization of AB was investigated by chronoamperometry, in which current density-time transients were fitted to related theoretical models. Morphological characteristics of poly(AB) thin films were examined by scanning tunneling microscopy and scanning electron microscopy. The chemical composition of the polymerized thin film was acquired by electron dispersive X-ray analysis. Optical characterization of both dissolved and solid-state samples was achieved by UV-Vis. absorption spectroscopy. It has been determined that early stages of electropolymerization of AB reveal random adsorption of poly(AB) species but regular polymeric thin film forms with the first progressive and then instantaneous mechanisms by the time.

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“…Surface properties of dye polymer thin films can be monitored by analyzing the nucleation and growth mechanism with morphological techniques and potentiostatic current density-time (j-t) transient experiments combined with theoretical nucleation modeling. Nucleation and growth mechanism of electropolymerization of various organic molecules [9,[29][30][31][32][33][34][35][36] were investigated by using potentiostatic j-t transient technique until now. We previously studied the nucleation and growth mechanism of electropolymerization of dyes of pyronin Y and methylene blue (MB) [17,37].…”

Section: Introductionmentioning

confidence: 99%

Chronoamperometric and morphological investigation of nucleation and growth mechanism of poly(azure A) thin films

Kalyoncu

Alanyalıoğlu

2011

Journal of Electroanalytical Chemistry

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Nucleation and growth mechanisms during electropolymerization of substituted 3-alkylthiophenes

Cited by 28 publications

References 21 publications

Nucleation and Growth Mechanism of Electropolymerization of Methylene Blue: The Effect of Preparation Potential on Poly(methylene blue) Structure

Nucleation and Growth Mechanism of Electropolymerization of Methylene Blue: The Effect of Preparation Potential on Poly(methylene blue) Structure

Formation Mechanism of Polymeric Thin Films of Azure B on Gold Electrodes

Chronoamperometric and morphological investigation of nucleation and growth mechanism of poly(azure A) thin films

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