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Title: An EIS study of DNA-modified electrodes
Authors: Brett, Christopher M. A. 
Brett, Ana Maria Oliveira 
Serrano, Sílvia H. P. 
Keywords: DNA-modified electrodes; Electrochemical impedance; Guanine; Adenine; Double-stranded DNA; Single-stranded DNA
Issue Date: 1999
Citation: Electrochimica Acta. 44:24 (1999) 4233-4239
Abstract: The preparation and conditioning of DNA-modified electrodes, in which glassy carbon electrodes are covered by a thick film of double-stranded DNA and subsequently conditioned in acetate buffer, has been followed with Electrochemical Impedance Spectroscopy. Spectra were recorded at different values of applied potential in order to probe the alterations occurring in the modifier layer. The alterations in the EIS response parallel the changes in voltammetric response and show that the modifier layer is a good conductor and that the behaviour as a DNA-biosensor is essentially due to surface phenomena and interaction with single-stranded DNA in solution during conditioning.
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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