Wednesday, 4 October 2017
Prince George's Exhibit Hall D/E (Gaylord National Resort and Convention Center)
Over the last 40 years, surface enhanced spectroscopic techniques have been used to study low concentrations of molecular species at surfaces. Among the more common of these techniques is surface enhanced infrared absorption spectroscopy (SEIRAS). SEIRAS utilizes surface plasmon phenomena to generate an interfacial electric field stronger than that of the incident light. Surfaces capable of supporting surface plasmons are generally composed of roughened metal films, or metal films coating a roughened surface. This work represents a study of roughened platinum surfaces deposited from different techniques including metal sputtering, evaporation, and wet chemical deposition. Diagnostics such as conductivity, optical transmission, particle size, and CO adsorptive capability were used to determine the ideal deposition parameters for a given application. After preparation, these surfaces are used to demonstrate plasmonically enhanced infrared absorption capabilities which we use in situ to study the mechanisms of electrochemical reactions in energy conversion devices.