NANOMETER-SCALE PATTERNING OF SURFACES USING SELF-ASSEMBLY CHEMISTRY - 3 - TEMPLATE-DIRECTED GROWTH OF POLYMER NANOSTRUCTURES ON ORGANOTHIOL SELF-ASSEMBLED MIXED MONOLAYERS

We report the template-directed growth of polyaniline nanostructures a t Au electrodes modified with two-component self-assembled monolayers consisting of 4-aminothiophenol (4-ATP) and n-octadecanethiol (ODT). 4 -ATP, which is more easily oxidized to the cation radical than aniline , serves as a nucleation site for the electrochemical deposition of po lyaniline. Therefore, when 4-ATP/ODT mixed monolayers are oxidized in the presence of aniline, polyaniline features are formed selectively f rom islands of 4-ATP embedded in the ODT monolayer. The size and distr ibution of these features were characterized by AFM. In this work, we show that the feature density is a function of monolayer composition a nd that the feature height is dependent on the concentration of anilin e in solution.