Chronoamperometry on ring, ring-recessed and disk electrodes, and their arrays. The sensitive measurement of diffusion coefficients independent of a knowledge of concentration or number of electrons transferred

Menshykau, Denis; O’Mahony, Aoife; Cortina‐Puig, Montserrat; Campo, F. Javier del; Muñoz, Francesc Xavier; Compton, Richard G.

doi:10.1016/j.jelechem.2010.05.018

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…A direct determination of concentration has been proposed by electrical charge measurement but demanding a rigorous sample preparation [19,20]. Original methods for simultaneous determination are the use of two methods [21][22][23], measurements on electrodes with different forms [24,25]-planar or cylindrical [26], the use of one electrode on different timescales [27][28][29][30][31][32].…”

Section: Diffusion As Mass Transport For Direct Determination Of D 0 mentioning

confidence: 99%

“…Other different possibilities of sizes and geometries of electrodes can be combined for a calibrationless method: a ring UME associated with planar, cylindrical or spherical electrode or a planar electrode associated with a spherical or cylindrical electrode. More recently numerical improvements in modeling allow to foresee more complex miniaturized systems [31,32], which could be of particular interest for in situ measurements.…”

Section: Chronoamperometry At Planar Electrodementioning

confidence: 99%

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Reagentless and calibrationless silicate measurement in oceanic waters

Giraud

Lesven

Jońca

et al. 2012

Talanta

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Determination of silicate concentration in seawater without addition of liquid reagents was the key prerequisite for developing an autonomous in situ electrochemical silicate sensor (Lacombe et al., 2007) [11]. The present challenge is to address the issue of calibrationless determination. To achieve such an objective, we chose chronoamperometry performed successively on planar microelectrode (ME) and ultramicroelectrode (UME) among the various possibilities. This analytical method allows estimating simultaneously the diffusion coefficient and the concentration of the studied species. Results obtained with ferrocyanide are in excellent agreement with values of the imposed concentration and diffusion coefficient found in the literature. For the silicate reagentless method, successive chronoamperometric measurements have been performed using a pair of gold disk electrodes for both UME and ME. Our calibrationless method was tested with different concentrations of silicate in artificial seawater from 55 to 140×10(-6) mol L(-1). The average value obtained for the diffusion coefficient of the silicomolybdic complex is 2.2±0.4×10(-6) cm(2) s(-1), consistent with diffusion coefficient values of molecules in liquid media. Good results were observed when comparing known concentration of silicate with experimentally derived ones. Further work is underway to explore silicate determination within the lower range of oceanic silicate concentration, down to 0.1×10(-6) mol L(-1).

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Section: Diffusion As Mass Transport For Direct Determination Of D 0 mentioning

confidence: 99%

Section: Chronoamperometry At Planar Electrodementioning

confidence: 99%

Reagentless and calibrationless silicate measurement in oceanic waters

Giraud

Lesven

Jońca

et al. 2012

Talanta

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“…Table 3 shows real values of the rate constant that can be extracted with the proposed generator-collector devices. It should be noted though that presented values are calculated for a single generator-collector device, application of arrays of generator-collector devices should not change significantly range of the rate constants available for the measurement [22], although later is advantageous due to the higher currents generated. For the second order chemical reaction rate constant values as high as diffusion controlled can be measured.…”

Section: Discussionmentioning

confidence: 99%

Plane-recessed disk electrodes and their arrays in transient generator–collector mode: The measurement of the rate of the chemical reaction of electrochemically generated species

Menshykau

Cortina‐Puig

Campo

et al. 2010

Journal of Electroanalytical Chemistry

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“…Based on the above various fabrication methods, different types of micro electrode arrays (e.g., microdisk or microband electrode array and interdigitated, linear or 3D micro electrode array, etc.) have been reported (Fiaccabrino et al, 1996;Aguiar et al, 2007;Ordeig et al, 2008;Xu et al, 2008;Menshykau et al, 2010;Yi et al, 2016).…”

Section: Fabrication and Characteristics Of Micro/nano Electrode Arraysmentioning

confidence: 99%

Micro/Nano Electrode Array Sensors: Advances in Fabrication and Emerging Applications in Bioanalysis

Liu

Chen

et al. 2020

Front. Chem.

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Due to the rapid development of micro/nano manufacturing techniques and the greater understanding in electrochemical principles and methods, micro/nano electrode array sensing has received much attention in recent years, especially in bioanalysis. This review aims to explore recent progress in innovative techniques for the construction of micro/nano electrode array sensor and the unique applications of various types of micro/nano electrode array sensors in biochemical analysis. Moreover, the new area of smart sensing benefited from miniaturization of portable micro/nano electrode array sensors as well as wearable intelligent devices are further discussed.

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Chronoamperometry on ring, ring-recessed and disk electrodes, and their arrays. The sensitive measurement of diffusion coefficients independent of a knowledge of concentration or number of electrons transferred

Cited by 8 publications

References 42 publications

Reagentless and calibrationless silicate measurement in oceanic waters

Reagentless and calibrationless silicate measurement in oceanic waters

Plane-recessed disk electrodes and their arrays in transient generator–collector mode: The measurement of the rate of the chemical reaction of electrochemically generated species

Micro/Nano Electrode Array Sensors: Advances in Fabrication and Emerging Applications in Bioanalysis

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