Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 14: Surface Chemical Dynamics
O 14.7: Talk
Monday, March 7, 2016, 16:45–17:00, S053
Temperature induced change in aliphatic monolayers observed by vibrational sum-frequency generation spectroscopy — •Andre Beier-Hannweg1, Katharina Maus1, Michael Lackner1, Thorsten Balgar2, Jan Weber1, and Eckart Hasselbrink1 — 1Institut für Physikalische Chemie, Universität Duisburg-Essen — 2Junior Uni-Wuppertal
The conformational order in long, aliphatic calcium-carboxylate Langmuir-Blodgett (LB) monolayers on solid glass supports is investigated by means of vibrational sum-frequency generation spectroscopy (VSFS). The C-H stretching vibrations of both the terminal methyl and the methylene groups are utilized to monitor the chain conformation at various sample temperatures. With increasing temperature, the LB-films exhibit structural changes, which can be probed by VSFS due to a difference in the corresponding signal-intensities at given temperatures. We will discuss how thermodynamic properties can be evaluated from the spectra.