Sum frequency generation spectroscopy (SFG) is a useful technique to study 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 is difficult to interpret the spectrum as single domain. The development of SFG into a microscopy has allow a more detailed and accurate analysis of the spatio-spectro-temporal evolution of the surface chemistry. The SFG microscope development will be presented, as well as the use of compressive sensing and the application toward corrosion inhibition, electrocatalysis and self-assembled monolayers.

Compressive-sensing sum frequency generation imaging of surfaces

2019 Fall National Meeting

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