Polymer Electrodes

the o rrole, opant ws th a slig olym 153 A eceive with small diameters would constitute a significant advance in car- Experimental l Soc 23.00 Downlorying out such studies. These ultramicroelectrodes would also be useful for biomedical applications such as in vivo analysis and sensing.4,5 When the electrodes are fibers of conducting polymers, there is the additional advantage of a more biologically benign surface4,6,7 for long-term implanted biomedical devices such as those used for deep-brain-stimulation electrodes in the treatment of Parkinson’s disease8 or epilepsy.9 There are a number of methods that have been reported in the literature for production of nano- or microscale conducting polymer fibers from heteroarylenes. These include electrodeposition from a monomer/dopant solution onto or in a template10 or microchannel,11 wet spinning from a spinnerette containing an aqueous polymer/ dopant solution into acetone,12 electrochemical production from micelles containing monomer solutions,13 production of fibers at the interface of an aqueous/organic biphasic system,14 self-assembly,13,15 electrodeposition from solution onto the tip of a larger electrode,16-18 or dry electrospinning across an air gap through Chemicals. — Platinum and gold wires were obtained from Alfa Aesar and were except for 25 m wire 99.9998 % purity. The 25 m wire was 99.95 % purity. Stainless steel wire was also ob-tained from Alfa Aesar. Acetonitrile was purchased from Fisher Sci-entific, and the 18.2 M water used for aqueous deposition experi-Preparation of Microfibe