Selective electrodeposition of polypyrrole using a STM tip as the coun
ter electrode has been examined to establish an ultra fine processing.
The electrodeposition is performed on a highly oriented pyrolytic gra
phite coated with the ionically conducting polymer of Nafion consistin
g of monomer and electrolyte. Spots of conducting polymers less than h
undreds nm, which depends on the polarity of deposition voltages, are
observed by STM image.