Pedot brushes electrochemically synthesized on thienyl-modified glassy carbon surfaces

Blacha, A.; Kościelniak, P.; Sitarz, M.; Szuber, J.; Żak, Jerzy

doi:10.1016/j.electacta.2011.12.063

Cited by 30 publications

(19 citation statements)

References 37 publications

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“…However, these processes have not been fully explored for the deposition of conjugated polymers widely used in flexible electronics . Reviewing the literature, a few results have been reported in this direction; they described attachment of conductive polymers on glassy carbon by means of electropolymerization and in situ chemical polymerization of aniline onto diazonium‐modified multiwalled carbon nanotubes (MWCNTs) . However, as far as flexible electronic devices are concerned, the deposition of adherent nanocomposite layers is challenging but important as it permits to improve (i) the physicochemical properties of the nanocomposite adlayers and (ii) to ensure the stability of the substrates–metal oxide–conducting polymer interface.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Mekki

Ait-Touchente

Samanta

et al. 2016

Macro Chemistry & Physics

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Vertically aligned core/shell‐like polyaniline‐wrapped ZnO nanorod composite films are prepared on diazonium‐modified biaxially oriented polyethylene terephthalate (BOPET) sheets, in two main steps. (i) The BOPET substrate is modified by grafting of 4‐aminobenzenoic groups from the in situ generated diazonium compound; (ii) ZnO nanorod/polyaniline composite film is grown on the substrates by wet chemical route followed by the preparation of polyaniline (PANI) by in situ chemical oxidative polymerization of aniline on the immobilized ZnO nanorods. Scanning electron microscopy images reveal the vertical growth and homogeneous distribution of the ZnO nanorods and their nanocomposites on the diazonium modified substrates. In contrast, the ZnO and PANI‐coated ZnO nanorods are randomly distributed on pristine BOPET. X‐ray photoelectron spectra permit to characterize the chemical nature of the aryl and the nanocomposite adlayers. X‐ray diffraction analysis results indicate that ZnO nanorods retain their wurtzite structure within the nanocomposite coating. Fourier‐transform infrared (FTIR) and Raman indicate the presence of interaction between ZnO nanorods and PANI chains. The ZnO/PANI‐coated diazonium‐modified BOPET sheets exhibit excellent mechanical flexibility with electroconductive characteristics even in the highly bent state. This work highlights the efficiency of the interfacial chemistry of aryl diazonium salts in the preparation of nanocomposite films with outstanding morphology, adhesion, and physical properties even under mechanical stress.

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Section: Introductionmentioning

confidence: 99%

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Mekki

Ait-Touchente

Samanta

et al. 2016

Macro Chemistry & Physics

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“…The surface chemistry of aryl diazonium salts has progressed at a remarkable pace since the last two decades, and opened so many new and innovative avenues in surface science in general and in materials engineering, in particular. Of relevance to the present paper, these compounds were demonstrated to be efficient coupling agents and offered various pathways to graft polymers through a broad range of substrates using a variety of surface‐confined polymerization methods, namely: atom transfer radical polymerization (ATRP), reversible addition–fragmentation chain transfer polymerization (RAFT), radical photopolymerization, iniferter ( ini tiator‐trans fer ‐ ter minator), anionic polymerization, electropolymerization, , and chemical or photochemical oxidative polymerization of conjugated monomers.…”

Section: Introductionmentioning

confidence: 99%

Diazonium salts for surface-confined visible light radical photopolymerization

Bakas

Yılmaz

Ait-Touchente

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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The surface chemistry of aryl diazonium salts has progressed at a remarkable pace in the last two decades, and opened many avenues in materials science. These compounds are excellent coupling agents for polymers to surfaces via several surface‐confined polymerization methods. For the first time, we demonstrate that diazonium salts are efficient for surface initiating radical photopolymerization in the visible light of methyl methacrylate (MMA) and 2‐hydroxyethyl methacrylate (HEMA) taken as model monomers. To do so, 4‐(dimethylamino)benzenediazonium salt was electroreduced on gold plates or flexible ITO sheets to provide 4‐(dimethylamino)phenyl (DMA) hydrogen donor layers; while excited state camphorquinone acted as the free hydrogen abstractor. In the same way, we co‐polymerized HEMA and MMA with ethylene glycol dimethacrylate in order to obtain crosslinked polymer grafts. We demonstrate by XPS that gold was efficiently screened by the polymer layers and that the wettability of the surfaces accounts for the hydrophilic or hydrophobic characters of the tethered polymers. Homo‐ and crosslinked PMMA grafts were found to resist removal by the paint stripper methyl ethyl ketone. The grafted DMA/camphorquinone system operating in the visible light holds great promises in terms of adhesion of in situ designed continuous or patterned polymer coatings on various substrates. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 3506–3515

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“…Recently, Blacha et al. have studied the polymerization of EDOT on glassy carbon (GC) electrodes modified by thiophenylbenzenediazonium (TBD) 40. In this work, the thiophene units grafted onto the GC surface have been used to initiate the electropolymerization process and the resulting polymer layers have been found to be more ordered and more uniformly structured than the classical films produced on bare electrodes.…”

Section: Introductionmentioning

confidence: 99%

A Novel Electrochemical Sensor Based on a Mixed Diazonium/PEDOT Surface Functionalization for the Simultaneous Assay of Ascorbic and Uric Acids. Towards an Improvement in Amperometric Response Stability

2014

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A new electrochemical sensor was developed for the simultaneous assay of 2 major antioxidants, namely ascorbic (AA) and uric (UA) acids in neutral media. The electrode was modified by means of electropolymerized conductive poly(3,4‐ethylenedioxythiophene) (PEDOT) organic films. The stability of the resulting interface was improved thanks to a thiophene‐containing diazonium layer previously grafted onto the glassy carbon substrate. The morphology and electrochemical properties of all PEDOT and diazonium/PEDOT layers were characterized by Field Emission Gun Scanning Electron Microscopy (FEG‐SEM) and cyclic voltammetry (CV). The best analytical performances were obtained for both biomarkers with diazonium electrodeposited under galvanostatic mode and PEDOT generated by CV. Using CV the sensitivities and detection limits were found to be 0.345 µA cm−2 µM−1 and 6 µM for AA and 0.665 µA cm−2 µM−1 and 1.5 µM for UA. The calibration curves were linear in the concentration range 12–1400 µM and 10–1000 µM for AA and UA, respectively. A high selectivity was observed with a detection potential difference more than 250 mV. The sensor exhibited a particularly long lifetime as well in storage (at least 85 % of the initial response recorded after one month) as in operational conditions (more than 80 % recovery after 40 successive measurements).

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Pedot brushes electrochemically synthesized on thienyl-modified glassy carbon surfaces

Cited by 30 publications

References 37 publications

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Diazonium salts for surface-confined visible light radical photopolymerization

A Novel Electrochemical Sensor Based on a Mixed Diazonium/PEDOT Surface Functionalization for the Simultaneous Assay of Ascorbic and Uric Acids. Towards an Improvement in Amperometric Response Stability

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