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Theme 1 colloquium by dr. Jan Versluis (AMOLF): 'Bending and Stretching: a Practical Examination of Molecules at Aqueous Interfaces' (Lecture)

Tuesday 7 June 2022Add to my calendar
from 16:00
Dr. Jan Versluis (AMOLF)

dr. Jan Versluis

Surface adsorption of molecules at aqueous solutions changes the macroscopic properties like surface tension, surface charge, and surface potential. These properties are important to biological systems like membranes, other functionalized surfaces used for artificial photosynthesis, or interfaces in electrochemistry. While the macroscopic properties can be relatively easily investigated with current techniques, the underlying molecular interactions are more difficult to probe experimentally. Here we present the phase-resolved vibrational sum-frequency generation technique to directly measure molecular responses from different air-aqueous interfaces. Surface selective Information about surface density and orientation can be directly related to molecular species. In this presentation, we will show experimental results based on recent papers highlighting the huge potential of vibrational sum-frequency generation as a tool to get unique information about molecular interactions at the interface.

Molecular orientation of small carboxylates at the water-air interface C. J. Moll, A. A. Korotkevich, J. Versluis, and H. J. Bakker Phys Chem. Chem. Phys., 2022,24, 10134-10139

Direct Evidence for a Surface and Bulk Specific Response in the Sum-Frequency Generation Spectrum of the Water Bend Vibration, C. J. Moll, J. Versluis, and H. J. Bakker Phys. Rev. Lett. 2021, 127, 116001

Direct Observation of the Orientation of Urea Molecules at Charged Interfaces Carolyn J. Moll, Jan Versluis, and Huib J. Bakker The Journal of Physical Chemistry Letters 2021 12 (44), 10823-10828

dr. Gilles de Wijs/dr. Joost Bakker