Mixed polyelectrolyte coatings on glassy carbon electrodes: Ion-exchange, permselectivity properties and analytical application of poly-l-lysine–poly(sodium 4-styrenesulfonate)-coated mercury film electrodes for the detection of trace metals

Monterroso, Sandra C. C.; Carapuça, Helena M.; Duarte, Armando C.

doi:10.1016/j.talanta.2005.08.029

Cited by 38 publications

(16 citation statements)

References 18 publications

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“…[1][2][3][4][5][6][7][8][9][10], polyalanine [11], polyglycine [12,13], poly(glutamic acid) [14][15][16][17][18], polyhystidine [19][20][21][22], polycysteine [23][24][25], polytyrosine [26] and polytryptofane [27,28]. Together with their ease of preparation, good stability, reproducibility, they show improved selectivity and sensitivity in electroanalytical measurements.…”

Section: Introductionmentioning

confidence: 99%

Poly(glutamic acid) nanofibre modified glassy carbon electrode: Characterization by atomic force microscopy, voltammetry and electrochemical impedance

Santos

Zanoni

Bergamini

et al. 2008

Electrochimica Acta

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Glassy carbon electrodes (GCE) were modified with poly(glutamic acid) acid films prepared using three different procedures: glutamic acid monomer electropolymerization (MONO), evaporation of poly(glutamic acid) (PAG) and evaporation of a mixture of poly(glutamic acid)/glutaraldehyde (PAG/GLU). All three films showed good adherence to the electrode surface. The performance of the modified GCE was investigated by cyclic voltammetry and differential pulse voltammetry, and the films were characterized by atomic force microscopy (AFM) and electrochemical impedance spectroscopy (EIS). The three poly(glutamic acid) modified GCEs were tested using the electrochemical oxidation of ascorbic acid and a decrease of the overpotential and the improvement of the oxidation peak current was observed. The PAG modified electrode surfaces gave the best results. AFM morphological images showed a polymeric network film formed by well-defined nanofibres that may undergo extensive swelling in solution, allowing an easier electron transfer and higher oxidation peaks.

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Section: Introductionmentioning

confidence: 99%

Poly(glutamic acid) nanofibre modified glassy carbon electrode: Characterization by atomic force microscopy, voltammetry and electrochemical impedance

Santos

Zanoni

Bergamini

et al. 2008

Electrochimica Acta

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“…Despite these works have obtained good sensitivity and selectivity, seeking a facile platform to get a wide linear range is necessary. Poly(sodium 4-styrenesulfonate) (PSS) is a cation-exchange polymer and can improve the sensitivity of the voltammetric signal of Cd 2 + and Pb 2 + due to its less compact structure with more sulfonate groups (per gram) available for interaction with cations and considerable film charge density in polyelectrolyte PSS led to an effective accumulation of metal ions contributing to signal enhancement [26][27][28]. What is more, graphene is dispersed into the PSS solution to form a homogeneous suspension.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Stripping Determination of Cadmium(II) and Lead(II) on Disposable Graphene Modified Screen‐Printed Electrode

Huangfu

et al. 2013

Electroanalysis

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In the present work, a sensitive, facile and disposable sensing platform for trace analysis of heavy metal ions was developed at the Bi modified graphene-poly(sodium 4-styrenesulfonate) composite film screen printed electrode (GR/ PSS/Bi/SPE). The GR/PSS/Bi/SPE improved sensitivity and linearity due to the functionalization of graphene with negatively charged PSS providing more absorbing sites. The detection limit of the GR/PSS/Bi/SPE is found to be 0.042 mg L À1 for Cd 2 + and 0.089 mg L À1 for Pb 2 + with linear responses of Cd 2 + and Pb 2 + in the range of 0.5-120 mg L À1. Finally, the practical application was confirmed in real water with satisfactory results.

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“…Due to the abundant functional groups, the polymer film modified electrode has stable performance and the ability to link biomolecules [5][6][7]. Poly-Llysine (pLys) is of versatility and easiness of preparation, and therefore has been used for the modification of the electrode and applied for the electrochemical determination of biomolecules [8,9]. The amino groups of pLys could form electrostatic affinity with the phosphate skeleton of DNA molecules to immobilize the probe DNA.…”

Section: Introductionmentioning

confidence: 99%

Improved electrochemical performances of polyaniline nanotubes-poly-L-lysine composite for label-free impedance detection of DNA hybridization

et al. 2010

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A sensitive label-free DNA hybridization biosensing platform was fabricated based on the synergistic effect of polyaniline nanotubes (PANI nt ) and poly-L-lysine (pLys). The composite of pLys and PANI nt was coated onto the carbon paste electrode (CPE) to form a uniform and very stable nanocomposite membrane. The pLys in the composite film not only acts as a membrane to retain good electron transfer capability of PANI nt even at physiological pH, but also possesses fine biocompatibility for bio-analytes. DNA probes with negatively charged phosphate groups were readily linked to the positively charged pLys surface due to the strong electrostatic affinity. The synergistic effect of PANI nt and pLys could significantly enhance the sensitivity of DNA hybridization recognition. The phosphinothricin acetyltransferase (PAT) gene fragment from transgenic corn and the polymerase chain reaction amplification of the terminator of nopaline synthase gene from the real sample of a kind of transgenic soybean were detected by this DNA electrochemical biosensor via label-free impedance method. This stable composite gives convenient permselectivity properties as a transducer material for the design of modern electrochemical impedance biosensor using [Fe(CN) 6 ] 3/4 as an indicator.

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Mixed polyelectrolyte coatings on glassy carbon electrodes: Ion-exchange, permselectivity properties and analytical application of poly-l-lysine–poly(sodium 4-styrenesulfonate)-coated mercury film electrodes for the detection of trace metals

Cited by 38 publications

References 18 publications

Poly(glutamic acid) nanofibre modified glassy carbon electrode: Characterization by atomic force microscopy, voltammetry and electrochemical impedance

Poly(glutamic acid) nanofibre modified glassy carbon electrode: Characterization by atomic force microscopy, voltammetry and electrochemical impedance

Sensitive Stripping Determination of Cadmium(II) and Lead(II) on Disposable Graphene Modified Screen‐Printed Electrode

Improved electrochemical performances of polyaniline nanotubes-poly-L-lysine composite for label-free impedance detection of DNA hybridization

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