Second harmonic light scattering (SHS) is a coherent second-order optical technique that is surface and symmetry sensitive and can be performed in-situ in the colloidal liquid environment. SHS has been recently proven to be sensitive to size, shape and composition of metallic (Ag) and dielectric (polystyrene) nano- and micro-particles with or without adsorbed molecular monolayers. Rigorous theoretical models have been developed to understand how these factors influence the nonlinear optical properties and explain the experimental data. In this report, we focus on the application of SHS for probing liquid/liquid colloidal systems such as emulsions and micelles, in particular the stability of these systems as influenced by solvent ionic strength and pH.

Colloidal particles and droplets probed by second harmonic light scattering

246th National Meeting (2013)

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