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The goal of this project is to develop a new method to pattern microscale conductive metal electrodes. Current techniques for patterning microelectrodes are typically multi-step photolithographic processes. This project aims to use a single photolithographic step that results directly in the desired microelectrode product. Two metals, silver and gold, have been investigated for this process. The reactions described using silver rely exclusively on a photoreductive mechanism. The proposed gold reaction will involve a sequential process of photoreduction followed by electrodeposition. Photoreduced metals are typically less conductive and more fragmented than electroplated metals. Electroplated metals are typically of high conductivity but difficult to spatially pattern. The new method called Microscopic Photochemical Laser Traced Electrodeposition (μPLATE), will use a focused laser to photochemically reduce Au3+ to Au1+ and then subsequently electroplate the more easily reduced Au1+ species. Electrochemical and photoreductive tests have been performed to demonstrate the feasibility of these gold reactions.
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Reed, Eric W., "Towards Microscale-Photochemical-LAser-Traced-Electrodeposition (μPLATE)" (2013). Senior Projects Fall 2013. 29.
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