Fabrication and characterization of a platinum/ceramic electrochemical sensor

Tieman, Robert S.; Igo, David H.; Heineman, William R.; Johnson, Jay M.; Seguin, Russell

doi:10.1016/0925-4005(91)80231-8

Cited by 11 publications

(10 citation statements)

References 17 publications

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“…The high and low‐density VACNFs were electrochemically characterized using CV because of its relative ease of measurement, versatility, as well as effectiveness for studying microscopic and macroscopic surface areas to distinguish between planar diffusion and the hemispherical diffusion that occurs at microelectrodes . The effect of scan rate using CV was investigated in order to determine the kinetic parameters and the electrochemical surface areas of the low and high‐density VACNFs.…”

Section: Resultsmentioning

confidence: 99%

“…The carbon nanofibers in a high‐density array do not act as individual nanoelectrodes because their diffusion layers overlap at the usual scan rates used for CV; however, individual nanoelectrode behavior is expected at a low‐density electrode array, if they are spaced sufficiently far apart that the diffusion layers for the individual VACNFs do not overlap on the time scale of the voltammogram . This phenomenon is usually seen in the cyclic voltammograms by a shift in slope of the plot of peak current versus the square root of scan rate over a wide range of scan rates . At slow scan rates, a slope corresponding to the macroscopic surface area is observed followed by a transition to a microscopic surface area slope at faster scan rates.…”

Section: Resultsmentioning

confidence: 99%

“…The Stokes‐Einstein equation was used in conjunction with dimensions obtained from scanning electron micrographs to estimate the time required for the diffusion layers of adjacent VACNFs to merge : Eqn.

true t = \frac{l^{2}}{2 D}

…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical Characterization of Vertically Aligned Carbon Nanofiber Arrays Prepared by Hole‐mask Colloidal Lithography

et al. 2016

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Nanoelectrode arrays consisting of vertically aligned carbon nanofibers were prepared through plasma enhanced chemical vapor deposition and patterned using hole‐mask colloidal lithography (HCL), a simple fabrication method employed as a cost‐effective patterning alternative to the conventional electron beam lithography. The density of the carbon nanofibers was easily altered by changing the concentration of the polystyrene spheres employed in HCL. Cyclic voltammetry and chronoamperometry were used to electrochemically characterize the arrays of different density. Results indicate that the density of the carbon nanofibers leads to differences in the macro/micro electroactive surface areas.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Electrochemical Characterization of Vertically Aligned Carbon Nanofiber Arrays Prepared by Hole‐mask Colloidal Lithography

et al. 2016

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“…Several attempts have been made to integrate the three-electrode system on a chip, which used a pseudo-Ag=AgCl-reference electrode [86]. For accurate potential measurements and settings, a reliable reference electrode is a prerequisite to assign a peak to respective analyte ions.…”

Section: General Electrochemical Analysismentioning

confidence: 99%

Advances in the Microfabrication of Electrochemical Sensors and Systems

Suzuki

2000

Electroanalysis

145

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Technologies to microfabricate electrochemical sensors and systems are rapidly advancing and will surely have an impact on critical fields such as medicine, environment, and information processing. It is a good opportunity to review the state of the art and trends in the technologies developed in this field during the last two decades of the 20th century and prepare for the coming decades. Here, developed electrochemical microsensors and microsystems will be reviewed in terms of techniques and performance along with the problems left as issues for the next century.

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“…Many materials of this type, which can be seen as a subgroup of so-called intelligent materials, 26 have polymers as their active species but also some materials based on transition metals have been published. [27][28][29][30][31][32][33] From this point of view, nanostructures of molybdenum oxide in the form of MoO 3 or as polyoxometalate clusters as in the famous Mü ller-type compounds [34][35][36] are interesting target structures for materials with redox sensing or electrochromic properties. Furthermore, porous materials hosting molybdenum oxide species are promising for catalysis.…”

Section: Introductionmentioning

confidence: 99%

Redox Behavior of Nanostructured Molybdenum Oxide−Mesoporous Silica Hybrid Materials

et al. 2003

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Encapsulation of molybdenum oxide MoO 3 into ordered mesoporous silica materials is demonstrated using different synthetic routes. Either supramolecular polyoxometalates of the "Mü ller type" or Na 2 MoO 4 were used as precursors. Molybdenum oxide (MoO 3 )-silica hybrid materials were characterized using nitrogen-sorption experiments, transmission electron microscopy, small-angle X-ray scattering, and infrared spectroscopy. Under reducing conditions, the hybrid materials undergo an electrochromic transition from colorless or slightly yellow to blue without any leaching of Mo species from the materials. The electrochromic response, which is fully reversible, is caused by a transition from Mo VI to a mixed valence Mo VI /Mo V molybdenum oxide encapsulated in the pores. The reduction process was studied using in situ electron spin resonance (ESR) and UV/vis absorption measurements. Materials of different pore sizes were used, and it was found that pore size effects the kinetics of the reaction.

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Fabrication and characterization of a platinum/ceramic electrochemical sensor

Cited by 11 publications

References 17 publications

Electrochemical Characterization of Vertically Aligned Carbon Nanofiber Arrays Prepared by Hole‐mask Colloidal Lithography

Electrochemical Characterization of Vertically Aligned Carbon Nanofiber Arrays Prepared by Hole‐mask Colloidal Lithography

Advances in the Microfabrication of Electrochemical Sensors and Systems

Redox Behavior of Nanostructured Molybdenum Oxide−Mesoporous Silica Hybrid Materials

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