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Authors: Porcel-Valenzuela M, Salinas-Castillo A, Morallón E, Montilla F
Article Title: Molecularly imprinted silica films prepared by electroassisted deposition for the selective detection of dopamine.
Publication date: 2016
Journal: Sensors and Actuators B: Chemical
Volume: 222
Page numbers: 63-70.
DOI: 10.1016/j.snb.2015.08.042
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0925400515302203
Abstract: Dopamine (DA) can be detected by electrochemical oxidation in conventional electrodes. However, the presence of other oxidizable species (interferents) usually present in physiological fluids at high concentrations (like ascorbic acid) makes very difficult its electrochemical detection. In the present work, glassy carbon electrodes have been modified with molecularly imprinted silica (MIS) films prepared by electroassisted deposition of sol-gel precursors. The production of MIS films was performed by adding the template molecule (DA) to the precursor sol. The molecular impression of silica was assessed showing a high coherency allowing a filtering capacity in the molecular scale. The MIS-modified electrodes present a high selectivity for the detection of DA in neutral or acidic solutions. The MIS-modified electrodes allow the amperometric determination of dopamine in solutions containing ascorbic acid with molar ratios lower than 1:50,000
Template and target information: dopamine, DA
Author keywords: molecular imprinting, Electrodeposited silica, Dopamine,Ascorbic acid, Electrochemical sensor
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