Electropolymerized molecularly imprinted polymers as receptor layers in a capacitive chemical sensors

Citation
Tl. Panasyuk et al., Electropolymerized molecularly imprinted polymers as receptor layers in a capacitive chemical sensors, ANALYT CHEM, 71(20), 1999, pp. 4609-4613
Citations number
23
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYTICAL CHEMISTRY
ISSN journal
00032700 → ACNP
Volume
71
Issue
20
Year of publication
1999
Pages
4609 - 4613
Database
ISI
SICI code
0003-2700(19991015)71:20<4609:EMIPAR>2.0.ZU;2-F
Abstract
The first application of molecularly imprinted polymers to:chemical sensors with capacitive detection is described. The sensitive layer was prepared b y electropolymerization of phenol on gold electrodes in the presence of the template (phenylalanine). The insulating properties of the polymer layer w ere studied by electrochemical impedance spectroscopy. Electrical leakages through the polymer layer were suppressed by deposition of a self-assembled monolayer of mercaptophenol before polymerization and of alkanethiol after polymerization. At the final stage of sensor preparation, the template was removed. The multilayer system obtained displayed a decrease in electrical capacitance on addition of phenylalanine. Only a low response was observed toward other amino acids and phenol.