Accession Number : ADA296393

Title :   Specific Immobilization of Electropolymerized Polypyrrole Thin Films Onto Interdigitated Microsensor Electrode Arrays.

Descriptive Note : Technical rept.,

Corporate Author : SOUTH CAROLINA UNIV COLUMBIA DEPT OF CHEMISTRY AND BIOCHEMISTRY

Personal Author(s) : Guiseppi-Elle, A. ; Wilson, A. M. ; Tour, J. M. ; Brockmann, T. ; Zhang, W.

PDF Url : ADA296393

Report Date : 07 JUN 1995

Pagination or Media Count : 33

Abstract : Electroactive polypyrrole (PPy) thin films were grown by potentiostatic electropolymerization at chemically derivatized interdigitated microsensor electrodes (IMEs) of gold on borosilicate glass leading to specific adhesion of the electroconductive polymer film to the device. Films were grown to a constant electropolymerization charge density of 70 mC/sq cm at 0.65 V vs Ag (sup o)/AgCl, 3 M Cl(-) from 1.0 M aqueous pyrrole solutions containing 5% poly(styrenesulfonic acid) (PSSA) and 1% dodecylbenzynesulphonate with the pH adjusted to 3.0 and the temperature maintained at 20 deg C. The interdigit space of the IME devices was chemically derivatized by chemical modification with 3-aminopropyltrimethoxysilane followed by direct linking of the 10 amine to the carboxylic acid of 3-(l-pyrrolyl)propionic acid using the heterobifunctional linker 1,3-diisopropylcarbodiimide enhanced with N-hydroxysulfosuccinimide in aqueous solution. The 3-(l-pyrrolyl)propionic acid was shown to be electroactive, electropolymerizable, and coelectropolymerizable with pyrrole monomer from aqueous solution. jg p.2

Descriptors :   *POLYMERIZATION, *THIN FILMS, *ELECTROCHEMISTRY, *PYRROLES, DETECTORS, SOLUTIONS(MIXTURES), CHEMICAL PROPERTIES, MODIFICATION, WATER, ADHESION, STYRENES, ARRAYS, GLASS, ELECTRICAL CONDUCTIVITY, ELECTRODES, POLYMERIC FILMS, SILANES, MONOMERS, RESTRAINT, CHARGE DENSITY, POTENTIOSTATIC TECHNIQUES, GOLD, BORON OXIDES, SILICATES, CARBOXYLIC ACIDS, SULFONIC ACIDS, MICROMINIATURIZATION, PROPIONIC ACID.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Physical Chemistry
      Electrical and Electronic Equipment
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE