Chronopotentiometry at Rotating Disk Electrodes.

Buck, Richard P.; Keller, H. E.

doi:10.1021/ac60196a002

Cited by 32 publications

(23 citation statements)

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“…Theoretical treatments of the current transient at a rotating disc electrode following application of a potential step into the mass transfer-limited regime have been published by several authors [18][19][20][21][22]. The present study will follow the formalism originally published by Bruckenstein and Prager [20], but corrected slightly by Myers et al [21].…”

Section: Resultsmentioning

confidence: 99%

Water diffusion coefficients during copper electropolishing

Suni

2004

Journal of Applied Electrochemistry

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Cu electropolishing was studied using a rotating disc electrode in a variety of phosphoric acid-based electrolytes, including several with ethanol and other species added as diluents. Diluents allow a wider range of water concentrations and electrolyte viscosities to be accessed and also reduce the removal rate during Cu electropolishing, simplifying possible application to damascene processing. Transient and steady state currents in the mass transfer limited regime are shown to depend on both the number of water acceptor molecules associated with each dissolving Cu ion and on the effective diffusion coefficient of water. Transient analysis samples the bulk transport properties, whereas steady state analysis integrates them through the diffusion layer. Assuming that the effective diffusion coefficients appropriate to transient and steady state behavior are the same, about one water molecule is associated with each dissolving Cu ion. This analysis yields effective diffusion coefficients for water on the order of 10 )9 cm 2 s )1 . However, the data is also consistent with an assumption that six water molecules are associated with each dissolving Cu ion, but the effective diffusion coefficient appropriate for a Levich analysis is somewhat lower than that in the bulk electrolyte. This analysis yields effective diffusion coefficients for water on the order of 10 )8 -10 )7 cm 2 s )1 . The latter interpretation, that six water molecules are associated with each dissolving Cu ion, appears more likely since it provides almost exact agreement with the effective diffusion coefficient reported previously by Vidal and West. In combination with previously published impedance results ruling out a salt film mechanism, the good agreement between the transient and steady state analyses confirm that water is the acceptor species that complexes dissolving Cu ions in phosphoric acid-based electropolishing baths.

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Section: Resultsmentioning

confidence: 99%

Water diffusion coefficients during copper electropolishing

Suni

2004

Journal of Applied Electrochemistry

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“…The Cottrellian current at RDE clearly reflects the transition from a transient state to a steady state. The Cottrell process at an RDE has been treated theoretically, [12][13][14][15] and various approximated formulas have been suggested, among which the result by Bruckenstein and Prager 13 is: …”

Section: Rotating-disk Electrode (Rde)mentioning

confidence: 99%

Exponentially Expanded Grid Network Approach (EEGNA): An Efficient Way for the Simulation of Electrochemical Problems at Spherical, Cylindrical and Rotating-disk Electrodes

2005

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An exponentially expanded space grid technique has been employed in the network simulation of chronoamperometric and voltammetric problems in spherical, cylindrical and rotating-disk electrode systems, leading to an effective simulation strategy for electrochemical problems: exponentially expanded grid network approach (EEGNA). The success of this method is largely due to the improved ability in processing the boundary singularities existing for non-planar diffusions and the enhanced simulation speed and accuracy in contrast to the uniform or quasi-uniform grid network approach.

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“…[1], [2], and [3] for the eontrolled cell eurrent gives E2R3 iD ~- [4] R6R2 E2 may also be any function of time supplied by an appropriate signal generator. [1], [2], and [3] for the eontrolled cell eurrent gives E2R3 iD ~- [4] R6R2 E2 may also be any function of time supplied by an appropriate signal generator.…”

Section: Circuitrymentioning

confidence: 99%

Circuit for Transient-Free Current-Potential Control Conversion

Bruckenstein¹,

Miller²

1970

J. Electrochem. Soc.

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A general technique for switching a closed loop control circuit from one function to another is described. A closed loop exists at all times, even during the switching operation. A potentiostat that can be switched to a galvanostat and vice versa in less than 10 ~sec was built. No spurious potential or current transients were observed on test or real cells. This potentio-galvanostat has been tested with a conventional three electrode cell, with a ring-disk electrode, and as a potentiostatic interrupter. 1040) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 134.71.135.144 Downloaded on 2015-03-13 to IP A n y discussion of this paper will appear in a Discussion Section to be published in the J u n e 1971 J O U R N A L .

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Chronopotentiometry at Rotating Disk Electrodes.

Cited by 32 publications

References 1 publication

Water diffusion coefficients during copper electropolishing

Water diffusion coefficients during copper electropolishing

Exponentially Expanded Grid Network Approach (EEGNA): An Efficient Way for the Simulation of Electrochemical Problems at Spherical, Cylindrical and Rotating-disk Electrodes

Circuit for Transient-Free Current-Potential Control Conversion

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