Influence of atomic-scale irregularities in fractal analysis of electrode surfaces

Eftekhari, Ali; Kazemzad, Mahmood; Keyanpour-Rad, Mansoor

doi:10.1016/j.apsusc.2004.05.279

Cited by 26 publications

(21 citation statements)

References 32 publications

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“…39 In general, chemical inhomogeneities of substrate surface strongly affect electrochemical systems. 40 In fast electrochemical polymerization, the same mechanism is followed, but there is not sufficient time for the generation of new growth sites, and the electrochemically synthesized polyaniline tends to form on available growth sites in the course of a fast electrochemical polymerization.…”

Section: Resultsmentioning

confidence: 99%

Polymerization of Aniline through Simultaneous Chemical and Electrochemical Routes

Eftekhari

Jafarkhani

2006

Polym J

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ABSTRACT:Simultaneous chemical and electrochemical polymerization of aniline was investigated to explore the competition between two polymerization routes. It was found that initial chemical polymerization may significantly affect the electrochemical polymerization; thus, it is possible to control the polymer morphology. By performing the electropolymerization with slow scans, the initial chemical polymerization results in the formation of a nanostructured backbone, which will also affect subsequent electropolymerization (even in the absence of chemical polymerization). By this trick, it is possible to prepare highly porous and uniform nanostructured polyaniline film adherently attached to the substrate surface. In fact, chemically synthesized polyaniline nano-particles acts as growth sites for electrochemical polymerization, and in appropriate condition, numerous sites are formed instead of their continuous growth.

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Section: Resultsmentioning

confidence: 99%

Polymerization of Aniline through Simultaneous Chemical and Electrochemical Routes

Eftekhari

Jafarkhani

2006

Polym J

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“…Some authors [2,3,[8][9][10]16,[19][20][21][22][23][24][25][45][46][47][48] have used scaling arguments to improve our understanding of certain aspects of diffusion-limited reactions which occur in fractal spaces (porous) or on fractal boundaries (rough). The scaling arguments, numerical and experimental studies [2,3,[8][9][10]16,[19][20][21][22][23][24][25][45][46][47][48] have shown that reaction rates follow approximately a power law relation in time. The scaling form for the current is…”

Section: Introductionmentioning

confidence: 99%

Diffusion-controlled potentiostatic current transients on realistic fractal electrodes

Jha

Sangal

Kant

2008

Journal of Electroanalytical Chemistry

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“…It is worth noting that plastic deformation is also accompanied by the formation of surface defects, and it is known that surface defects significantly affect electrochemical processes. 27 However, such probable surface defects were healed by simple thermal treatment before electrochemical experiments. In fact, the only possible reason for the occurrence of such phenomenon is special structure appeared on the Pd lattice as a result of plastic deformation.…”

Section: Resultsmentioning

confidence: 99%

Electropolymerization of Aniline on Plastically Deformed Pd Surface: Structure at Micro- and Nano-Scale

Eftekhari

Kazemzad

Keyanpour-Rad

2006

Polym J

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ABSTRACT:Electrochemical polymerization of aniline on the surface of a plastically deformed Pd electrode was investigated. Initially, the Pd electrode was subject of plastic deformation as a result of hydrogen insertion/extraction. Plastically deformed structure of the substrate has a significant influence on the electropolymerization process. In this case, an adherent film with smooth surface is formed. Although the plastically deformed surface is rougher than the conventional Pd surface, the polyaniline film electropolymerized is smoother in both micro-and nano-scale. This is of particular interest for applied purposes, as it guarantees higher stability of the conductive polymer. In addition, these results indicate the importance of surface structure of substrate electrode on electropolymerization process. On the other hand, it suggests Pd as a suitable substrate for the preparation of thin films of conductive polymers.

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Influence of atomic-scale irregularities in fractal analysis of electrode surfaces

Cited by 26 publications

References 32 publications

Polymerization of Aniline through Simultaneous Chemical and Electrochemical Routes

Polymerization of Aniline through Simultaneous Chemical and Electrochemical Routes

Diffusion-controlled potentiostatic current transients on realistic fractal electrodes

Electropolymerization of Aniline on Plastically Deformed Pd Surface: Structure at Micro- and Nano-Scale

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