gamma-irradiation-induced grafting of poly (styrenesulfonate) to poly(tetrafluoroethylene) shielded microelectrodes.
A new method for the fabrication and polymer modification of microelectrodes is described. These electrodes are constructed by heat sealing the electroactive material in dual shrink/melt poly(tetrafluoroethylene) (PTFE) under vacuum. The PTFE shield may be activated to provide a support upon which polymers of interest may be grafted. gamma-Irradiation was used to graft polymerize styrene to the surface. The poly-(styrene) was subsequently sulfonated with chlorosulfonic acid to form poly(styrenesulfonate). Scanning electron microscopy and Raman microspectroscopy provide evidence that the poly-(styrenesulfonate) film has been formed and extends over the electrode material. Voltammetry indicates that hexaammine-ruthenium(III) cation is preconcentrated and stabilized via an association with the polymer film.
Department of Chemistry, University of Cincinnati, Ohio 45221-0172.
B L
BL
Ramos
E A
EA
Blubaugh
T H
TH
Ridgway
W R
WR
Heineman
D002411:Cation Exchange Resins / Q000737:chemistry; D005720:Gamma Rays; D008839:Microelectrodes; D008855:Microscopy, Electron, Scanning; D011137:Polystyrenes / Q000737:chemistry*; D011138:Polytetrafluoroethylene / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
D002411:Cation Exchange Resins; D011137:Polystyrenes; C003321:polystyrene sulfonic acid; D011138:Polytetrafluoroethylene