Electrophoretic deposition of nanocomposites formed from polythiophene and metal oxides

Trung, Vũ Quốc; Pavlík, Martin; Hebestreit, Niels; Pfleger, Jiřı́; Rammelt, U.; Plieth, W.

doi:10.1016/j.electacta.2005.05.052

Cited by 59 publications

(26 citation statements)

References 26 publications

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“…In this technique a colloidal deposition process occurs assisted and controlled by an applied electric field [13]. Charged particles in a liquid migrate towards an electrode under the electric field (electrophoresis) and then the particles deposit on the electrode surface forming a homogeneous film via particle aggregation [14]. With a microelectrode and locally generated electric fields micropatterns of deposits can be fabricated [15,16].…”

Section: Introductionmentioning

confidence: 99%

Arsenite Determination in Phosphate Media at Electroaggregated Gold Nanoparticle Deposits

Rassaei¹,

Sillanpää²,

French³

et al. 2008

Electroanalysis

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Compared to bulk gold, highly reactive mesoporous gold film deposits are prepared on a boron-doped diamond electrode surface. An electroaggregation process causing 5 nm diameter gold nanoparticles to deposit cathodically from aqueous solution is implemented to control the amount of mesoporous gold at the electrode surface. The resulting electrode surface is characterized by electron microscopy and by cyclic voltammetry. The reactivity of the electroaggregated gold deposit towards arsenite is investigated in nitric acid media and in neutral phosphate buffer media. Three processes consistent with (i) cathodic deposition of arsenic metal (As(III) ! As(0)), (ii) anodic stripping (As(0) ! As(III)), and oxidation of arsenite (As(III) ! As(V)) are observed and shown to shift in potential with approximately 58 mV per pH unit (Nernstian at 20 8C). Improved anodic stripping voltammetry responses for solutions of arsenite(III) in 0.1 M HNO 3 and in 0.1 M phosphate buffer solution are observed as the gold nanoparticle deposition time is increased. Typical detection limits of LOD(3s) ¼ 30 ppb in nitric acid and LOD(3s) ¼ 1 ppb in phosphate buffer (pH 7) are observed.

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Section: Introductionmentioning

confidence: 99%

Arsenite Determination in Phosphate Media at Electroaggregated Gold Nanoparticle Deposits

Rassaei¹,

Sillanpää²,

French³

et al. 2008

Electroanalysis

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“…In this context, electrophoretic deposition from a colloidal suspension of a conducting polymer has been shown to result in nano-structured conjugated polymer films [30,31]. Tada and Onoda [32,33] have utilized electrophoretically deposited nano-structured polymer films for fabrication of organic light emitting diodes, display devices, artificial fingerprint devices and for photovoltaic applications etc.…”

Section: Introductionmentioning

confidence: 99%

“…The electrophoretic technique is known to yield uniform, dense and porous conducting polymer films [30]. In this context, electrophoretic deposition from a colloidal suspension of a conducting polymer has been shown to result in nano-structured conjugated polymer films [30,31].…”

Section: Introductionmentioning

confidence: 99%

Cholesterol biosensor based on electrophoretically deposited conducting polymer film derived from nano-structured polyaniline colloidal suspension

Dhand

Singh

Arya

et al. 2007

Analytica Chimica Acta

108

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“…The spectrum of PTh/ITO (curve a) shows a broad absorption band from 350 to 650 nm with its maximum absorption at ~500 nm, which is attributed to π-π* (HOMO-LUMO) transition of the polythiophene backbones. It has been reported that the large π-conjugated systems of polythiophene can create small π-π* energy gaps within the visible spectrum [29]. The width of absorption band indicates the coexistence of both long and short effective conjugation lengths in the polythiophene chains.…”

Section: Optical Propertiesmentioning

confidence: 99%

Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

Liang

2009

Applied Catalysis B: Environmental

199

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In this study, polythiophene-TiO 2 nanotube films (PTh/TNT) were successfully prepared by a two-step electrochemical process of anodizaton and electropolymerization, in which a highly-ordered TiO 2 nanotube (TNT) film was anodized at a low-voltage with post calcination first and then the prepared TNT film was deposited with a polythiophene layer by electropolymerization in the BFEE electrolyte. The morphology and structures of PTh/TNT composites were examined by FESEM, EDX, XRD, and XPS methods. XPS spectra of PTh/TNT composites indicate the strong interaction between S sites of polymer backbone and TiO 2 nanotubes, in which electron transfer from polythiophene to titania takes place. UV-vis DRS analysis shows that these composites have a strong photoresponse in the visible region at 500 nm. The prepared PTh/TNT films revealed significant activity for 2,3-DCP degradation under visible light irradiation and also sunlight irradiation, in which the PTh3/TNT film achieved the best performance. On the other hand, this study also confirmed that the sidechains of polythiophene could influence its photocatalytic activity significantly in an order from high to low as poly3-methylthiophene ≈ polythiophene > polythiophenecarboxylic acid > poly3-hexylthiophene. The results may provide useful information to further develop This is the Pre-Published Version.2 some effective polymer-semiconductor catalysts for pollutant degradation under sunlight irradiation for water and wastewater treatment.

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Electrophoretic deposition of nanocomposites formed from polythiophene and metal oxides

Cited by 59 publications

References 26 publications

Arsenite Determination in Phosphate Media at Electroaggregated Gold Nanoparticle Deposits

Arsenite Determination in Phosphate Media at Electroaggregated Gold Nanoparticle Deposits

Cholesterol biosensor based on electrophoretically deposited conducting polymer film derived from nano-structured polyaniline colloidal suspension

Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

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