Diffusion-controlled currents of redox latex particles with polystyrene-core and polyallylamine-ferrocenyl shell

Chen, Jingyuan; Zhang, Zhijun

doi:10.1016/j.jelechem.2005.05.008

Cited by 15 publications

(12 citation statements)

References 35 publications

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“…The insoluble light-yellow species could be dissolved in water, methanol, and ethanol. The dissolved PAAFc has been demonstrated not to contain the FcCOO substituent 7a. The spectrum of the insoluble species was similar to that of the PAAFc in the previous paper .…”

Section: Resultssupporting

confidence: 80%

“…The dissolved PAAFc has been demonstrated not to contain the FcCOO substituent 7a. The spectrum of the insoluble species was similar to that of the PAAFc in the previous paper . This extraction corresponds to the separation of the hydrophilic PAAFc shell from the hydrophobic polystyrene core.…”

Section: Resultssupporting

confidence: 74%

“…Aqueous solutions were prepared by the use of ion-exchanged, distilled water. The synthesis process of PSPAAFc was the same as that previously described, with care taken to remove water from the reactor.…”

Section: Methodsmentioning

confidence: 99%

“…Then the geometrical hindrance can be overcome by using redox species as a mediator, exemplified by the reaction of flavin adenine dinucleotide in enzymes with the help of ferrocenyl moieties , There are basically three models of geometrical hindrance: (a) the reaction only in the geometrical contact domain,6a (b) a given thickness of a reaction layer from the electrode,6b and (c) rotational diffusion of the particle near the electrode . The partial charge transfer can obviously be improved by enhancing charge-transport rates within the particle.…”

Section: Introductionmentioning

confidence: 99%

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Voltammetry of Suspensions of Hollow Particles with Ferrocene-Immobilized Polyallylamine Shells

et al. 2006

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Redox-active hollow spheres were prepared through extracting a polystyrene core from the latex particle (PSPAAFc) composed of the core and the polyallylamine shell including ferrocenyl carboxylic amide. The suspension of the hollow spheres showed anodic and cathodic voltammetric peaks, which were nearly reversible and diffusion-controlled. The current was 3 times as large as the current for the suspension of the filled PSPAAFc. This value agreed with the theoretical one evaluated from the diameter (1.28 microm), the number of ferrocenyl moieties per particle, 1.2 x 108, by UV spectroscopy, and the diffusion coefficient obtained from the Stokes-Einstein equation. This fact indicates the reaction of the whole loaded charge, in contrast to the partial charge transfer of PSPAAFc. The dynamic flattening motion was observed to support the reaction of the whole charge.

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Section: Resultssupporting

confidence: 80%

Section: Resultssupporting

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Voltammetry of Suspensions of Hollow Particles with Ferrocene-Immobilized Polyallylamine Shells

et al. 2006

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“…Mass transport properties of suspensions are revealed in the voltammetric behavior (Chen, & Zhang, 2005;Aoki & Ke, 2006;Chen, et al, 2006;Han, et al, 2007;Chen, et al, 2008). Voltammograms in the PANI-GN suspension at the naked platinum electrode are shown in Fig.…”

Section: Voltammetrymentioning

confidence: 99%

Voltammetry of Suspensions of Polyaniline-coated Graphene Composites

Chen

Zeng

Aoki³

et al. 2015

IJC

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Flaky particles of polyaniline (PANI)-graphene (GN) with rectangular size of 1.0-1.5 m are dispersed in aqueous solution so that their suspension is stable for one day without aggregation. The weight fraction of PANI in the particle is 75 %, which is independent of the loaded fraction of PANI in the synthesis. The PANI-GN film made of the suspension forms a self-standing, elastic, conductive film. The PANI-GN suspension exhibits both the reduction and the oxidation waves at potentials similar to those of PANI adsorbed on an electrode, whereas the PANI-GO suspension shows only the voltammetric reduction wave. The redox peak currents are controlled by diffusion of PANI-GN flakes. The PANI-GN film cast on the electrode shows voltammetric peaks for PANI, of which redox charge is larger than that of the electrochemically polymerized PANI film with the common weight of PANI. This fact can be explained in terms of the electrochemically exhaustive oxidation of PANI through the electric conduction of GN.

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Rotational diffusion current of multi-charged redox species by means of Monte Carlo simulation

Aoki

2006

Electrochimica Acta

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Multi-charged redox species such as dispersed metal nanoparticles and latex particles have exhibited diffusion-controlled currents, which may be caused by not only the conventionally translational diffusion but also by the rotation of the species or random orientation toward the electrode. Rotational diffusion was here taken into account by use of the multiple redox-charged model particle which moves back and force in thin layer cell as well as rotates clockwise and counterclockwise by means of the Monte Carlo simulation. The steady-state current was smaller than the current which might flow if all the charge were to transfer at infinite rotational speed. The current values had a linear relation with the -1/2 powers of the number of the charge per particle. This relation was in accord with the experimental results of the partial charge transfer reaction of the ferrocene-immobilized latex suspension

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Diffusion-controlled currents of redox latex particles with polystyrene-core and polyallylamine-ferrocenyl shell

Cited by 15 publications

References 35 publications

Voltammetry of Suspensions of Hollow Particles with Ferrocene-Immobilized Polyallylamine Shells

Voltammetry of Suspensions of Hollow Particles with Ferrocene-Immobilized Polyallylamine Shells

Voltammetry of Suspensions of Polyaniline-coated Graphene Composites

Rotational diffusion current of multi-charged redox species by means of Monte Carlo simulation

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