Regensburg 2025 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 27: Focus Session Chemical Imaging for the Elucidation of Molecular Structure I (joint session O/BP)

BP 27.3: Hauptvortrag

Donnerstag, 20. März 2025, 16:00–16:30, H24

Sum Frequency Generation Microscopy of Electrochemical Interfaces — •Steven Baldelli — University of Houston, Houston, Texas

Sum frequency generation spectroscopy (SFG) is a valuable technique to study the molecular properties of surfaces. As a second-order technique, it is uniquely sensitive to the average organization of molecules at the surface. However, as most surfaces are spatially heterogeneous, it isn't easy to interpret the spectrum as a single domain. The development of SFG into microscopy has allowed a more detailed and accurate analysis of the spatio-spectro-temporal evolution of surface chemistry. The SFG microscope development will be presented, and compressive sensing and the application toward electrocatalysis will be used.

Keywords: surface chemistry; electrochemistry; sum frequecy generation; nonlinear optics; microscopy