Experimental Observations of Free‐Convection Mass Transfer to a Horizontal Surface with a Micromosaic Electrode

Dees, Dennis W.; Tobias, Charles W.

doi:10.1149/1.2100462

Cited by 21 publications

(22 citation statements)

References 3 publications

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“…The micromosaic electrode used in this study was conceived by Dees and Tobias (1982) and was designed in a collaborative effort with the Hewlett-Packard Company. The design was modified for this investigation, and the electrodes were fabricated using integrated-circuit technology at Hewlett-Packard Laboratories, and later at AT&T Bell Laboratories.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The data are taken by a Hewlett-Packard 9825T desktop computer, stored on floppy disk, and later transferred to a mainframe computer. Tobias (1982, 1987a) give a detailed description of the fabrication of the first generation of electrodes and of the data acquisition system. Modifications of electrode fabrication and the materials used in the electrodes built for this study are described elsewhere (Whitney, 1987).…”

Section: Experimental Methodsmentioning

confidence: 99%

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Mass‐transfer effects of bubble streams rising near vertical electrodes

Whitney

Tobias

1988

AIChE Journal

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Mass-transfer enhancement by a stream of bubbles rising near a planar, vertical surface is resolved spatially and temporally using a micromosaic electrode. A stream of gas bubbles is generated electrolytically, either at a segment directly below and in the plane of the monitoring electrodes, or at a wire tip that can be positioned inside or outside the mass-transfer boundary layer. The mass-transfer enhancement resulting from bubbles rising within the mass-transfer boundary layer is found to be strong and localized, in agreement with trends predicted by a surface-renewal model. Mass transfer resulting from bubbles rising outside the boundary layer is found to receive a steady, laminar enhancement, correlating well with predictions from an idealization of the bubble stream entraining a cylinder of liquid.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Mass‐transfer effects of bubble streams rising near vertical electrodes

Whitney

Tobias

1988

AIChE Journal

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“…Dees and Tobias [131] designed such an array, which was named the micromosaic electrode (MME), shown in Fig. 5.2.…”

Section: Mass-transfer Studies With a Micro-mosaic Electrodementioning

confidence: 99%

“…Experiments measuring the local mass-transport enhancement to vertical electrodes by multiple gas columns were performed using a redesigned version of a micromosaic (MME) electrode developed earlier in this laboratory by Dees [131]. By measuring the change in local limiting current of an indicator reaction (the reduction of Fe+3 to Fe+2), the magnitude and spatial distribution of convective transport enhancement can be determined.…”

Section: Electrochemical Cellmentioning

confidence: 99%

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Micro-scale mass-transfer variations during electrodeposition

Sutija¹

1991

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Multiplexing of Microelectrode Arrays in Voltammetric Measurements

et al. 2000

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Multipotentiostats are the equipment commonly used for voltammetric measurements with multichannel electrode arrays, because the conditioning of the working electrodes does not allow fast multiplexing for measuring current responses. In this article, multiplexing and serial read‐out of electrode arrays using a simple potentiostat and integrated circuits are shown. Several specially constructed switches, which were integrated in an application specific integrated circuit (ASIC) in complementary metal oxide semiconductor (CMOS) technology, allow electrode potentials to be applied as if by a potentiostat during the read‐out time as well as continuously applying a bias voltage during stand‐by. The application of multiplexing and serial read‐out is demonstrated by redox recycling of p‐aminophenol in an interdigitated microelectrode array made in silicon technology. Here, a bipotentiostat generates two different potentials that are addressed by the ASIC to the anodes and cathodes for redox recycling. The results show the same quality as those using a multipotentiostat.

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Experimental Observations of Free‐Convection Mass Transfer to a Horizontal Surface with a Micromosaic Electrode

Cited by 21 publications

References 3 publications

Mass‐transfer effects of bubble streams rising near vertical electrodes

Mass‐transfer effects of bubble streams rising near vertical electrodes

Micro-scale mass-transfer variations during electrodeposition

Multiplexing of Microelectrode Arrays in Voltammetric Measurements

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