Molecular interface is intrinsically heterogeneous. Structure and interaction at interfaces are dynamic and complex.  Interface selective sum-frequency generation vibrational spectroscopy (SFG-VS) has been a unique and powerful tool to study the structure and interaction at molecular interfaces. However, its application to complex interfaces has been limited by the lack of resolution and understanding of spectral or dynamical details. Here I would like to discuss recent experimental and theoretical progresses on sub-wavenumber resolution SFG-VS that can probe nearly intrinsic spectral line shape and details in coherent dynamics. Such developments provide new opportunities for applications of SFG in elucidating detailed structural inhomogeneity and dynamic interactions of complex molecular interfaces, including colloidal, environmental, material, and biological interfaces.

Surface nonlinear vibrational spectroscopy for complex molecular interface

247th National Meeting (2014)

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