Deposition of Conducting Polyaniline Patterns with the Scanning Electrochemical Microscope

Conducting polyaniline patterns were deposited on gold, platinum, and carbon surfaces with the use of the scanning electrochemical microscope (SECM). The patterns were deposited in the "microreagent" mode in which a local pH change caused by proton reduction at the SECM tip allowed deposition to occur at the substrate. The effect of tip and substrate potential, tip‐substrate separation, and deposition time were studied in order to produce well‐resolved patterns of the desired thickness. Lateral resolution of the deposited polymer was as low as 3 μm. Conductivity of the film was verified by SECM imaging.