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Reference type: Journal
Authors: Chen PY, Nien PC, Wu CT, Wu TH, Lin CW, Ho KC
Article Title: Fabrication of a molecularly imprinted polymer sensor by self-assembling monolayer/mediator system.
Publication date: 2009
Journal: Analytica Chimica Acta
Volume: 643
Issue: (1-2)
Page numbers: 38-44.
DOI: 10.1016/j.aca.2009.04.004
Alternative URL: http://www.sciencedirect.com/science/article/B6TF4-4W1JW2T-2/2/91992d03699c1ffae5ac39107bdcf145

Abstract: Detection of dopamine (DA) by using a molecularly imprinted polymer (MIP) which fabricated by the self-assembling monolayer (SAM)/mediator system was studied. The SAM was made by attaching thioglycolic acid (TGA) on a gold electrode and quercetin (Q) was selected as an electron transfer mediator in this system. Methyl methacrylate (MMA) was polymerized by photopolymerization with the addition of dopamine to form a MIP electrode. The MIP and non-MIP (NMIP) modified electrodes were identified by FTIR and scanning electrochemical microscopy (SECM) approach curves. DA was detected by an amperometric method at a constant potential of 0.45V and obtained a sensitivity of 0.445mAcm-2M-1. The imprinting efficiency approaches infinity due to a non-reactive surface of NMIP. In the interference test, ascorbic acid contributed less than 12% of current response in the coexistence solution with DA and the performance is highly related to the concentration of template added during the fabrication process
Template and target information: dopamine, DA
Author keywords: artificial enzyme, imprinting efficiency, molecularly imprinted polymer, scanning electrochemical microscopy, Self-assembly monolayer

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