Channel Electrodes — A Review

Abstract

Recent progress in the development of channel electrode voltammetry is reviewed. Both experimental and fundamental aspects are addressed, and the power of the approach is illustrated with a variety of applications.

Intrinsic Kinetics of Gypsum and Calcium Sulfate Anhydrite Dissolution: Surface Selective Studies under Hydrodynamic Control and the Effect of Additives

“…[24][25][26] The CFC method permits rate laws governing a dissolution reaction to be proposed and tested by comparing experimental data to the predictions from mass transport-chemical reactivity models. 24,25 Hitherto, dissolution in the CFC method has typically been monitored by the use of local electrochemical measurements [24][25][26][27] to provide insitu detection of the dissolution process. However, some types of electrodes, e.g.…”

“…27 Such cells place some restrictions on sample size and the way in which crystal materials are presented for study. We have recently introduced a new CFC design and fabrication procedure using micro-stereo lithography (MSL) to produce radically miniaturized one-part CFC units.…”

Electrochemical techniques and sensors for ocean research

“…The rotation of the electrode pumps solution towards the surface of the electrode and the diffusion layer thickness is determined by the rotation rate. In electrochemical sensors the flow cell (Cooper and Compton, 1998) is the preferred design where the solution flows over the electrode. Here the flow rate determines the thickness of the diffusion layer.…”

“…Diffusion control is achieved with membrane covered electrodes (Clark Jr. et al, 1953), thin layer cells (Bard and Faulkner, 2001) and microdisc electrodes (Montenegro et al, 1991). Hydrodynamic control is achieved with rotating disc electrodes (Bard and Faulkner, 2001), channel electrodes (Cooper and Compton, 1998) and hydrodynamic modulation, e.g. with microjet electrodes (Macpherson, 2000).…”

Construction and characterisation of a modular microfluidic system: coupling magnetic capture and electrochemical detection

“…This modification would take full advantage of the system microfluidics, which provides controlled and well-defined mass transport conditions leading to higher steady state currents. Amperometry is a relatively simple but very important 15 detection technique in lab-on-a-chip devices because currents recorded in channel electrodes (Alden et al, 1998, Morland andCompton, 1999) under laminar flow are directly proportional to analyte concentration (Amatore et al, 2008, Cooper and Compton, 1998, Rees and Compton, 2008, Rossier and Girault, 2001, Tokuda and Matsuda, 1974. The main advantages of this system are its re-usability and that 20 its configuration can be changed easily so the user can try several electrode configurations with the same holder.…”