Bipartite expressions for amperometric currents of recessed, membrane covered planar and hanging mercury drop electrodes

Rong, Zimei; Vadgama, Pankaj

doi:10.1016/j.jelechem.2007.11.016

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…With this latter approach we monitored and matched responses on a real time basis against model simulated responses incorporating Fick's Laws. We have previously reported on software to achieve this based on a bipartite, time partitioned, solution to Fick's Laws that combines speed, repeatability and simplicity [ 37 , [44] , [45] , [46] , [47] , [48] , [49] ].…”

Section: Introductionmentioning

confidence: 99%

An electrochemical study of acrylate bone adhesive permeability and selectivity change during in vitro ageing: A model approach to the study of biomaterials and membrane barriers

Raja

Shelton

Salamat-Zadeh

et al. 2019

Analytica Chimica Acta: X

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This study assessed the solute permeability of a family of UV and moisture cured acrylates-based adhesives during in vitro ageing in pH 7.4 buffer. Acrylates have a potential role in bone fracture fixation, but their inability to allow microsolute exchange between the fractured bone surfaces may contribute to ineffective healing. Cyclic voltammetry and chronoamperometry were used to determine the diffusion coefficients for various electrochemically active probe molecules (O 2, H 2 O 2 , acetaminophen, catechol, uric acid and ascorbic acid) at proprietary acrylic, urethane – acrylate and cyanoacrylate adhesives. All adhesives proved to be impermeable for up to 9 days ageing, following which a near-exponential increase in permeability resulted for all solutes. At 18 days, the diffusion coefficients were in the range of 10 −5 cm 2 s −1 for O 2 and H 2 O 2 and 10 −6 cm 2 s −1 for the organic solutes; no transport selectivity was seen between the latter. Adhesive joint strength showed a direct, inverse, correlation with permeability, with the more hydrophilic cyanoacrylates showing the greatest loss of strength. Adhesive permeabilisation does not appear to be compatible with the retention of bonding strength, but it serves as a new non-destructive predictor of adhesion strength change during ageing and practical use.

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Section: Introductionmentioning

confidence: 99%

An electrochemical study of acrylate bone adhesive permeability and selectivity change during in vitro ageing: A model approach to the study of biomaterials and membrane barriers

Raja

Shelton

Salamat-Zadeh

et al. 2019

Analytica Chimica Acta: X

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Bio-sensing using recessed gold-filled capillary amperometric electrodes

et al. 2010

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A novel recessed electrode is reported for amperometric detection of hydrogen peroxide and via glucose oxidase for the detection of glucose. The electrode utilised electrodeposited platinum over a gold wire surface, which proved to be an effective peroxide-detecting surface. Compared with a traditional exposed electrode surface, the recessed tip facilitated an extended linear range for glucose from 4 to over 14 mM. Bio-fouling, as assessed by exposure to bovine serum albumin, was also significantly reduced. Though response time at the recess was increased, it was within an acceptable range for physiological monitoring. Moreover, the recess enabled precise measurement of the hydrogen peroxide diffusion coefficient; this was based on a bipartite expression for the transient amperometric current at the recessed structure following a step change in ambient hydrogen peroxide concentration. An important aspect of the diffusion measurement was the curve fitting routine used to map on to the theoretical response curve.

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An electrochemical method for measurement of mass transport in polymer membranes using acetaminophen as a model system

Rong

Vadgama

2009

Electrochimica Acta

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Bipartite expressions for amperometric currents of recessed, membrane covered planar and hanging mercury drop electrodes

Cited by 4 publications

References 18 publications

An electrochemical study of acrylate bone adhesive permeability and selectivity change during in vitro ageing: A model approach to the study of biomaterials and membrane barriers

An electrochemical study of acrylate bone adhesive permeability and selectivity change during in vitro ageing: A model approach to the study of biomaterials and membrane barriers

Bio-sensing using recessed gold-filled capillary amperometric electrodes

An electrochemical method for measurement of mass transport in polymer membranes using acetaminophen as a model system

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