Title :
Polymer composite coated multifiber array microelectrodes as multifunctional voltammetric microsensor for the detection of dopamine
Author :
Laubender, E. ; Garay, F. ; Heinze, J. ; Urban, G.
Author_Institution :
Freiburg Mater. Res. Center, Freiburg, Germany
Abstract :
An integrated, tip-shaped micro array sensor with counter electrodes, an electrochemically deposited Ag/AgCl reference electrode and a dopamine sensing working electrode covered with an antifouling film of conducting polymer has been realized. Using for the first time an electrochemically deposited coating consisting of a composite of poly(1,4-ethylenedioxythiophene)/carbon nanotubes/surfactants on a Pt microelectrode surface, dopamine concentrations as low as 200 nM could be measured with differential pulse voltammetry.
Keywords :
biosensors; carbon nanotubes; conducting polymers; electrochemical electrodes; electrochemical sensors; electrodeposits; filled polymers; microelectrodes; microsensors; platinum; polymer films; silver; silver compounds; voltammetry (chemical analysis); Ag-AgCl; PEDOT; Pt; antifouling film; carbon nanotubes; conducting polymer film; counter electrodes; differential pulse voltammetry; dopamine detection; dopamine sensing working electrode; electrochemically deposited reference electrode; multifiber array microelectrodes; multifunctional voltammetric microsensor; poly(1,4-ethylenedioxythiophene); polymer composite; surfactants; tip-shaped microarray sensor; Carbon nanotubes; Coatings; Conductive films; Counting circuits; Electrodes; Microelectrodes; Microsensors; Polymer films; Pulse measurements; Sensor arrays; CNT; Multifiber microelectrode; PEDOT; amperometric sensor; antifouling; carbon nanotubes; conducting polymer; dopamine; electrochemical coating; microelectrode sensors; neurotransmitter; tip shaped microelectrode array;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
DOI :
10.1109/SENSOR.2009.5285545
