Second harmonic generation studies of the ice/water interface

Cynthia M. Bouchez; Janice M. Hicks

doi:10.1117/12.221471

25 September 1995 Second harmonic generation studies of the ice/water interface

Cynthia M. Bouchez, Janice M. Hicks

Author Affiliations +

Proceedings Volume 2547, Laser Techniques for Surface Science II; (1995) https://doi.org/10.1117/12.221471
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Understanding the structure of the interface between ice and liquid water is essential to the study of molecular adsorption at this boundary. Despite great interest in the ice/water interface, experimental studies are sparse. In this work, the nonlinear optical laser technique, second harmonic generation (SHG), is used in a total internal reflection geometry to probe the single crystalline ice/water interface. SHG signals from the clean ice/water interface are observed and attributed to symmetry breaking at the boundary. We report observation of a linear adsorption isotherm when water is replaced by 0.2 to 7 (mu) M solutions of 2,2'- dihydroxy-1,1'-binaphthyl (BN). The coverage is most likely submonolayer; therefore, we observe only the beginning of the adsorption profile. We argue that BN adsorption is entropy driven. In a separate study, 0.02 to 1 mg/mL solutions of winter flounder antifreeze protein are contacted with the ice. The adsorption profile closely follows the freezing point depression activity curve of the protein.

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Cynthia M. Bouchez and Janice M. Hicks "Second harmonic generation studies of the ice/water interface", Proc. SPIE 2547, Laser Techniques for Surface Science II, (25 September 1995); https://doi.org/10.1117/12.221471

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