ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The surface properties of carbon film electrode sensors covered by coating with Nafionpolymer film, before and after electrochemical analysis of sub-micromolar traces of lead andcadmium ions, were investigated. These protective polymer films are applied to the electrodesurfaces to prevent the irreversible adsorption of chemical species, such as proteins and surfactantspresent in natural media, which leads to a decrease in response. Electrochemical impedancespectroscopy and voltammetric techniques were used for characterisation. The effect of non-ionicsurfactant molecules in solution on the behaviour of the polymer-coated electrode was alsoinvestigated. It is shown that permanent changes to the structure and morphology of the Nafion filmand of the carbon-Nafion interface occur after deposition of the trace metal ions, an effect which islessened in the presence of surfactant
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.514-516.1313.pdf
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