Nano nickel oxide/nickel incorporated nickel composite coating for sensing and estimation of acetylcholine

Shibli, S.M.A.; Beenakumari, K. S.; Suma, N.

doi:10.1016/j.bios.2006.01.020

Cited by 49 publications

(29 citation statements)

References 34 publications

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“…Recently, nickel hydroxide electrodes have shown good electrocatalytic properties for the oxidation of aspirin [3], methane [4], and acetylcholine [5]. The nickel electrode exhibit catalytic activity in the oxidation of a wide variety of organic compounds in alkaline solutions.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Special Potential Scan Programs for Cyclic Voltammetric Development of Different Nickel Oxide-Hydroxide Species on Ni Based Electrodes

Pissinis¹,

Sereno²,

Marioli³

2012

OJPC

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Special potential scan programs were designed for cyclic voltammetric development of β-NiOOH or γ-NiOOH/ β-NiOOH mixtures on the surface of nickel or nickel-chromium (80:20) alloy electrodes in NaOH 0.10 M. The programs consisted on changing the anodic or cathodic switching limit to facilitate the chemical reactions taking place either between Ni(II) hydroxides or between Ni(III) oxides-hydroxides. The electrochemical charge density under the oxidative wave, observed at Ni or Ni-Cr electrode surfaces at approximately 0.48 V (vs SCE), remained almost constant with the number of cv cycles after approximately 600 cv cycles at 0.050 V/s. Thus, it can be suggested that a stable proportion of Ni(II)/Ni(III) oxides-hydroxides was obtained on the electrode surfaces. The relative amounts of β-NiOOH or γ-NiOOH species were calculated from the electrochemical charges under their reduction waves in the voltammetric experiments. Higher charge densities were always obtained with Ni-Cr alloy electrodes as compared to pure Ni electrodes. Linear relationships were obtained in our study on the dependence of the oxidative peak current with the square root of the scan rate at a scan rate range between 0.01 V/s and 0.16 V/s.

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Section: Introductionmentioning

confidence: 99%

Utilization of Special Potential Scan Programs for Cyclic Voltammetric Development of Different Nickel Oxide-Hydroxide Species on Ni Based Electrodes

Pissinis¹,

Sereno²,

Marioli³

2012

OJPC

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“…Nickel oxyhydroxide thin films are especially suitable for sensing small organic molecules because of the formers good chemical and thermal stability and inherent chemical compatibility with nickel oxide or hydroxide. Nickel oxyhydroxide strongly adsorb organic substrates and has high electrocatalytic efficiency toward the oxidation of organic molecules via cyclically mediated electron-transfer processes in alkaline solutions [52,53].…”

Section: Resultsmentioning

confidence: 99%

Novel Chromosomal DNA Assay Based on Nickel Hydroxide Nanocomposite Films with Facile Construction

Jiang

Villagomez

et al. 2010

Electroanalysis

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We present a new protocol for DNA assay under ambient, routine operation. The novelty of the proposed approach is the direct analysis, meaning there is no need for derivatization or other pretreatments which are usually coupled with conventional bio or biochemical assay. The proposed method is based on our new preparation of a nanocomposite thin film composed of nickel hydroxides. Fabrication of the sensing film is facile, in situ, and thickness-controllable, and combines the metal deposition and the subsequent stripping/formation. The film construction and the novel sensing events were thorough examined and characterized by various techniques. Although the responding sensitivities vary among nucleic acids, the sensing mechanism was found to be attributed to the Ni(III/II) moieties within the film. In alkaline media the electrogenerated higher valent Ni(III) would oxidize DNA at around the redox potential of Ni(III/II). This electrocatalytic oxidation thus accounts for the much enhanced voltammetric current and for the much reduced overpotentials of these analytes at unmodified electrodes. The advantage of this protocol stemmed from the utilization of the same medium for both sensor fabrication and subsequent exploration that preserve and maximize the catalytic capacity. In addition to chromosomal DNAs, denatured DNA, single stranded DNA, and synthetic oligomers can all be determined by the proposed protocol with negligible interference. The present work offers a fast, ergonomic, and cost-effective alternative to the existing DNA assay arena.

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“…The nickel hydroxide is an important electroactive material for many applications of interest such as oxidation and determination of carbohydrates and alcohols [1,2] , amino acids [3], hydrogen peroxide [4], methane [5], drugs [3] and some other organic and biologically important products [3,[5][6][7][8]. Also, the material shows high electrocatalytic efficiency towards the oxidation of organic molecules via cyclic mediation electron-transfer processes in alkaline solutions [1,[3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Also, the material shows high electrocatalytic efficiency towards the oxidation of organic molecules via cyclic mediation electron-transfer processes in alkaline solutions [1,[3][4][5][6][7][8]. The formation of nickel hydroxide on the electrode surface to construct Ni-hydroxide modified electrodes has been achieved, in principle, in several different ways: by electrooxidation of nickel metal via different regimes of applied potential (e.g.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Charge Transport Process at Nickel Hydroxide-Gold Modified Electrodes employing Rotating Disc Electrode Voltammetry and Ac Impedance Measurements

Tucceri

2014

PCHE

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The aim of the present work was study how the charge-transport process of a nickel hydroxide film electrochemically synthesized on a gold substrate is modified when the electrode is stored without use for long time. It was found that nickel hydroxide films deactivate under storage, that is, films become less conductive than immediately prepared ones (nondeactivated). This study was carried out in the context of the Rotating Disc Electrode Voltammetry (RDEV) and Electrochemical Impedance Spectroscopy (EIS) when the modified electrode contacts an electroactive solution and a redox reaction occurs at the Au−Ni(OH) 2 |ectrolyte interface. Variations of anodic limiting currents with the electrode rotation rate, for both nondeactivated and deactivated films in the presence of the electroactive solute deferasirox (4-(3,5-bis(2-hydroxyphenyl)-1,2,4-triazol-1-yl) benzoic acid) allowed one obtaining a charge transport rate across a nickel hydroxide film, which decreases with the increase of the storage time. Interpretation of impedance spectra obtained at potential values corresponding to the anodic limiting currents on the basis of an impedance model that considers an uniform and nonporous nickel hydroxide film deposited in a conductive substrate and no penetration of redox species (deferasirox) from the solution, allowed one obtaining different interfacial resistances and electron and ion diffusion coefficients for the Au−Ni(OH) 2 |ectrolyte system.

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Nano nickel oxide/nickel incorporated nickel composite coating for sensing and estimation of acetylcholine

Cited by 49 publications

References 34 publications

Utilization of Special Potential Scan Programs for Cyclic Voltammetric Development of Different Nickel Oxide-Hydroxide Species on Ni Based Electrodes

Utilization of Special Potential Scan Programs for Cyclic Voltammetric Development of Different Nickel Oxide-Hydroxide Species on Ni Based Electrodes

Novel Chromosomal DNA Assay Based on Nickel Hydroxide Nanocomposite Films with Facile Construction

A Study of the Charge Transport Process at Nickel Hydroxide-Gold Modified Electrodes employing Rotating Disc Electrode Voltammetry and Ac Impedance Measurements

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