Berlin 2005 – wissenschaftliches Programm
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O: Oberflächenphysik
O 30: Adsorption an Oberfl
ächen III
O 30.6: Vortrag
Montag, 7. März 2005, 12:00–12:15, TU EB301
Observing enantio selective adsorption: D and L cysteine on Au(17 11 9) — •Richard Schillinger1, Joachim Wider1,2, Christoph Quitmann2, and Thomas Greber1 — 1Universiät Zürich, Winterthurerstrasse 190, 8057 Zürich, Schweiz — 2Paul Scherrer Institut, 5232 Villigen PSI, Schweiz
The conformation of chiral D and L cysteine (CYS) on the chiral gold surface Au(17 11 9) is directly determined by angle scanned x-ray photo electron diffraction (XPD).
This is realized by the use of a third generation synchrotron light source ( the swiss light source), where the sensitivity of the experiments is pushed forward by two orders of magnitude.
For D and L cysteine we find in the 2π half space above the surface one single scattering maximum, though on different emission angles for L and D CYS, respectively. This demonstrates chiral hetero recognition, i.e. enantio selectivity of the S-kinks on Au(17 11 9).