Microwriting of Gold Patterns with the Scanning Electrochemical Microscope

The deposition of gold patterns on indium‐tin‐oxide (ITO) with the scanning electrochemical microscope (SECM) has been accomplished by the controlled dissolution of a gold microelectrode. The continuous anodic dissolution of gold at the microelectrode in the presence of bromide while maintaining the potential of the ITO constant resulted in the deposition of microcrystalline structures of gold. The unique advantages of the SECM made it possible to suggest a mechanism for the process based on the structures as well as the parameters that control the deposition process.