Title:	Simple and low-cost ultramicroelectrode fabrication and characterization method for undergraduate students
Authors:	Sur, Ujjal Kumar Dhason, A. Lakshminarayanan, V.
Keywords:	Second-Year Undergraduate Upper-Division Undergraduate Analytical Chemistry Laboratory Instruction Physical Chemistry Hands-On Learning/Manipulatives Oxidation/Reduction
Issue Date:	Jan-2012
Publisher:	American Chemical Society
Citation:	Journal of Chemical Education, 2012, Vol.89, p168-172
Abstract:	A laboratory experiment is described in which students fabricate disk-shaped gold and platinum microelectrodes with diameters of 10–50 μm by sealing sodalime glass with metal microwires. The electrodes are characterized by performing cyclic voltammetry in aqueous and acetonitrile solution. Commercial microelectrodes are expensive (cost depends on the diameter of electrode) and may deter introduction of voltammetric experiments into laboratory classes at the undergraduate level. The students also fabricate a simple operational amplifier (op amp)-based potentiostat along with a low-current measuring device. This low-cost fabrication helps the students understand the details of instrumentation of a potentiostat with special knowledge in analog electronics. This experiment can be included in the electrochemistry laboratory course for undergraduate students. This experiment can also be incorporated into various undergraduate laboratory courses such as analytical chemistry, general chemistry, biochemistry, physical chemistry, and instrumentational methods of analysis.
Description:	Restricted Access
URI:	http://hdl.handle.net/2289/5273
ISSN:	0021-9584
Alternative Location:	http://adsabs.harvard.edu/abs/2012JChEd..89..168S http://dx.doi.org/10.1021/ed101065e
Copyright:	2012 American Chemical Society
Appears in Collections:	Research Papers (SCM)

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