UNSPECIFIED (2001) Hydrodynamic ultramicroelectrodes: kinetic and analytical applications. In: 3rd International Symposium on Electrochemical Microsystem Technologies (EMT-3), SEP 10-15, 2000, GARMISCH-PARTENKIRCHEN, GERMANY.

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Abstract

This review considers the development and application of hydrodynamic ultramicroelectrodes (H-UMEs). These electrochemical systems comprise an amperometric UME, with a characteristic dimension on the micrometre or sub-micrometre scale, operated in a well-defined convective- diffusive regime. The greatly enhanced mass-transport rates that can be attained quantitatively at H-UMEs, over a wide dynamic range, has considerable benefits in terms of measuring fast kinetics and in analytical applications. Four types of H-UMEs are assessed: (i) fast-flow tubular and channel microelectrodes; (ii) a dropping mercury microelectrode; (iii) a microscopic wall-tube electrode, termed the microjet electrode (MJE); and (iv) a radial flow micro-ring electrode (RFMRE). Hydrodynamic modulation methods are also described, that can be used in association with UMEs to extend amperometric detection limits. Finally, possible future directions for H-UMEs are considered briefly, along with new methods for enhancing the timescale of dynamic electrochemical measurements. (C) 2001 Elsevier Science Ltd. All rights reserved.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	ELECTROCHIMICA ACTA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0013-4686
Date:	1 September 2001
Volume:	47
Number:	1-2
Number of Pages:	17
Page Range:	pp. 29-45
Publication Status:	Published
Title of Event:	3rd International Symposium on Electrochemical Microsystem Technologies (EMT-3)
Location of Event:	GARMISCH-PARTENKIRCHEN, GERMANY
Date(s) of Event:	SEP 10-15, 2000
URI:	http://wrap.warwick.ac.uk/id/eprint/11686

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