Electrosynthesis and analytical characterisation of polypyrrole thin films modified with copper nanoparticles

Cioffi, Nicola; Torsi, Luisa; Losito, Ilario; Franco, Cinzia Di; Bari, Isabella De; Chiavarone, Luca; Scamarcio, Gaetano; Tsakova, V.; Sabbatini, Luigia; Zambonin, P. G.

doi:10.1039/b009857o

Cited by 63 publications

(56 citation statements)

References 32 publications

(50 reference statements)

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“…37,38 respectively. 34,39 The ratio 1.0/(6.9+1.0) = 0.13 represents the fraction of charged nitrogen, which can be associated to the doping level of the electropolymerized material (Supporting Information). In contrast, PNMPy-Omp2a presents a single peak at 399.5 eV due to the overlapping of the binding energies associated to the C-N bond of NMPy units and the N-C=O (amide) of the protein, the latter being also around 400 eV.…”

Section: Synthesis and Characterization Of Pnmpy-omp2amentioning

confidence: 99%

Polypyrrole-Supported Membrane Proteins for Bio-Inspired Ion Channels

Pérez‐Madrigal

Valle

Armelín

et al. 2015

ACS Appl. Mater. Interfaces

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Biomedical platforms constructed by immobilizing membrane proteins in matrices made of synthetic organic polymers is a challenge since the structure and function of these proteins are affected by environmental conditions. In this work an operative composite that regulates the diffusion of alkali ions has been prepared by functionalizing a supporting matrix made of poly(N-methylpyrrole) (PNMPy) with a β-barrel membrane protein (Omp2a) that forms channels and pores. The protein has been unequivocally identified in the composite and its structure has been shown to remain unaltered. The PNMPy-Omp2a platform fulfills properties typically associated to functional biointerfaces with biomedical applications (e.g. biocompatibility, biodegrabadility and hydrophilicity). The functionality of the immobilized protein has been examined by studying the passive ion transport response in presence of electrolytic solutions with Na + and K + concentrations close to those found in blood. Although the behavior of PNMPy and PNMPy-Omp2a is very similar for solutions with very low concentration, the resistance of the latter decreases drastically when the concentration of ions increases to ∼100 mM. This reduction reflects an enhanced ion exchange between the biocomposite and the electrolytic medium, which is not observed in PNMPy, evidencing that PNMPy-Omp2a is particularly well suited to prepare bio-inspired channels and smart biosensors.

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Section: Synthesis and Characterization Of Pnmpy-omp2amentioning

confidence: 99%

Polypyrrole-Supported Membrane Proteins for Bio-Inspired Ion Channels

Pérez‐Madrigal

Valle

Armelín

et al. 2015

ACS Appl. Mater. Interfaces

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“…It should then be concluded that the copper deposit is mainly formed by Cu(I) species along with minor metallic Cu. Moreover, the Cl2p 3/2 line at 198.8 eV and the O1s line at 531.0 eV are compatible with the occurrence of mixed Cu(I) chloride-Cu(I) oxide clusters [21]. A careful inspection of the O1s spectral region ( fig.…”

Section: Resultsmentioning

confidence: 87%

“…The [Cl+2O 1 ]/[Cu] peak area ratio exceeds 1, which confirms that grains observed in SEM micrographs (fig 3b) are chiefly composed of Cu(I) species, at least at the outermost layers probed by XPS. Copper (I) clusters were also identified as the major species in Cu-Ppy, Cu-PANI and Cu-PMT composites obtained by pulsed potentiostatic deposition from Cu(II) solutions [21,23,24]. Copper (I) particles dispersed onto polymeric matrices have shown to possess excellent electrocatalytic properties for the constant-potential amperometric detection of polyhydroxyl compounds and amino acids in alkaline media [23,24].…”

Section: Resultsmentioning

confidence: 99%

“…After the anodic limit has been reached the application of the reduction potential generates copper metal particles on the surface. According to earlier authors [20,21], chloridecontaining solutions allow the deposition of Cu(I) species, while cathodic reduction from CuSO 4 favors the formation of Cu(0). For the determination of GABA, calibration curves for the response of Cu-dispersed modified electrodes were derived from the measurement of the charge under i-t transients recorded in 5 to 10 mg/L GABA solutions while a potential step of 0.8 V vs SCE was applied.…”

Section: Methodsmentioning

confidence: 99%

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Electrochemical synthesis and characterization of poly(2,2’-dithiodianiline) thin films loaded with copper microparticles. Application to the amperometric analysis of γ-aminobutyric acid

et al. 2005

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SummaryModified electrodes with poly(2,2'-dithiodianiline),PDTDA, were prepared from the corresponding monomer by cyclic voltammetry between 0.0 V and 1.5-1.6 V on gold or stainless steel respectively. The potentiodynamic method proved to bring about good quality and adherent thin films. The wide potential window shown by this modified electrode allowed attempting the insertion of copper in the polymeric matrix using several strategies. The response of this modified electrode copper was checked in the presence of γ-aminobutyric acid (GABA). Copper loaded on PDTDA/Au electrodes showed the highest sensitivity along with a stable and reproducible response for the detection of GABA. The surface morphology and composition analysis by SEM and XPS shows that copper is deposited in the polymeric matrix as uniformly scattered microparticles. The surface of these particles is mainly composed of Cu(I) species.

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“…Andreoli et al (2011) studied the electrodeposition of hierarchical micro/nanostructures of copper hyroxysulfates on thin film of polypyrrole-polystyrene sulfonate. Some researchers have reported the work of copper fractal on polypyrrole doped with different anions (Sakar, Zhou, Tannous, & Leung, 2003;Cioffi et al, 2001). Akbar et al (2009) reported that the fractal growth pattern of zinc dendrites was affected by different experimental conditions and the value of fractal dimension was estimated as 1.669.…”

Section: Introductionmentioning

confidence: 99%

Copper Fractal Growth Pattern in Polymer Systems

Masood¹,

Perveen²,

Ashfaq³

2012

IJC

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This paper presents the effect of polymer (polyvinyl alcohol) on the growth of copper fractal formation. A thin layer electrochemical cell was designed for the study of copper electrodeposition process. The structure and morphology for the copper fractal patterns were investigated by scanning electron microscopy (SEM). The copper fractal dimension was measured by using box counting method. On the basis of diffusion limited aggregation (DLA) model, growth pattern of copper fractal is two dimensional in nature. The copper fractal dimension is affected by the composition of polyvinyl alcohol. The growth pattern of copper fractal formation was measured under constant potential condition.

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Electrosynthesis and analytical characterisation of polypyrrole thin films modified with copper nanoparticles

Cited by 63 publications

References 32 publications

Polypyrrole-Supported Membrane Proteins for Bio-Inspired Ion Channels

Polypyrrole-Supported Membrane Proteins for Bio-Inspired Ion Channels

Electrochemical synthesis and characterization of poly(2,2’-dithiodianiline) thin films loaded with copper microparticles. Application to the amperometric analysis of γ-aminobutyric acid

Copper Fractal Growth Pattern in Polymer Systems

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