Studies on the Electrochemical Behaviour of Hydroquinone at L-cysteine Self-Assembled Monolayers Modified Gold Electrode

Wang, Shengfu; Du, Dan

doi:10.3390/s20200041

Cited by 56 publications

(30 citation statements)

References 24 publications

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“…However, potentials as high as +800 mV (versus SCE) have been employed at pH 7.0, albeit in buffered acetate electrolyte (Wang and Du, 2002). To investigate the potential-dependent behaviour of Au and Pd under conditions appropriate to later biological applications (buffered chloride solution, pH 7.4), and to compare with more common Pt and GC substrates, CV experiments were carried out scanning between 0 and 0.8 V (versus SCE) in PBS for the four electrode materials (Fig.…”

Section: Background Electrolytementioning

confidence: 99%

Comparisons of platinum, gold, palladium and glassy carbon as electrode materials in the design of biosensors for glutamate

O’Neill

Chang

Lowry

et al. 2004

Biosensors and Bioelectronics

124

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Four electrode materials: Pt, Au, Pd and glassy carbon (GC), were studied to investigate their suitability as substrates in the development of two different classes of glutamate biosensor. Glutamate oxidase cross-linked onto poly(o-phenylenediamine) was chosen as the type 1 biosensor (PPD/GluOx), incorporating PPD as the permselective element to detect H 2 O 2 directly on the electrode surface at relatively high applied potentials. GluOx and horseradish peroxidase/redox polymer modified electrodes (Os 2+ PVP/HRP/GluOx) that relied on enzyme-catalysed H 2 O 2 detection at lower applied potentials were used as type 2 biosensors.The voltammetric and amperometric responses to the enzyme signal transduction molecule, H 2 O 2 , and the archetypal interference species in biological applications, ascorbic acid, were determined on the bare and PPD/GluOx-modified surfaces. The amperometric responses of these electrodes were stable over several days of continuous recording in phosphate buffered saline (pH 7.4). The sensitivity of the type 1 biosensors to H 2 O 2 and glutamate showed parallel trends with low limits of detection and good linearity at low concentrations: Pt > Au ∼ Pd GC. Type 2 biosensors out-performed the type 1 design for all electrode substrates, except Pt. However, the presence of the permselective PPD membrane in the type 1 biosensors, not feasible in the type 2 design, suggests that Pt/PPD/GluOx might have the best all-round characteristics for glutamate detection in biological media containing interference species such as ascorbic acid. Other points affecting a final choice of substrate should include factors such as mass production issues.

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Section: Background Electrolytementioning

confidence: 99%

Comparisons of platinum, gold, palladium and glassy carbon as electrode materials in the design of biosensors for glutamate

O’Neill

Chang

Lowry

et al. 2004

Biosensors and Bioelectronics

124

View full text Add to dashboard Cite

show abstract

“…(ii) The strong specific interaction of gold with sulfur resulting in stable monolayer formation [130,131,147] in a short time [141] and in a very reproducible way [131].…”

Section: Self-assembled Monolayermentioning

confidence: 99%

Self-Assembled Monolayers on Nano-structured Composites for Electrochemical Sensing Applications

Atta¹,

El-Ads²,

Galal³

2015

Handbook of Nanoelectrochemistry

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Self-assembled monolayer (SAM) represents one of the methods to precisely modify surface structures in the nanoscale dimension. It has opened up a new era of exploration and has a profound impact on sensors and biosensors due to its unique properties. Different self-assemblies will be considered in this chapter: SAM of metallic nanoparticles on polymeric film, SAM of surfactant on polymeric film, and SAM of S-containing compounds on nanometallic films. The main goal of this chapter is to present comprehensive collection of the recent achievements in this area. Several issues will be discussed including the morphology, sensitivity, selectivity, stability, and electrochemical properties of the sensor.

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“…Various ion radicals that are methyl viologen, benzyl viologen, hydroquinone, tetracyanoquinodimethane, and www.intechopen.com neutral red (NR) have been used as electron mediator to induce electrochemical redox reaction between electrode and electron carriers that are NAD + , FAD, and cytochrome C (Pollack et al, 1996;Park et al, 1997;Wang and Du, 2002;Kang et al, 2007). In order to in vivo drive and maintain bacterial metabolism with electrochemical reducing power as a sole energy source, only NAD + or NADP + is required to be reduced by coupling redox reaction between electron mediator and biochemical electron carrier .…”

Section: Electrochemical Redox Mediatormentioning

confidence: 99%

Bioelectrochemical Fixation of Carbon Dioxide with Electric Energy Generated by Solar Cell

Park¹,

Jeon²,

Jung³

2011

Solar Cells - New Aspects and Solutions

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Studies on the Electrochemical Behaviour of Hydroquinone at L-cysteine Self-Assembled Monolayers Modified Gold Electrode

Cited by 56 publications

References 24 publications

Comparisons of platinum, gold, palladium and glassy carbon as electrode materials in the design of biosensors for glutamate

Comparisons of platinum, gold, palladium and glassy carbon as electrode materials in the design of biosensors for glutamate

Self-Assembled Monolayers on Nano-structured Composites for Electrochemical Sensing Applications

Bioelectrochemical Fixation of Carbon Dioxide with Electric Energy Generated by Solar Cell

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