Enantiospecific adsorption of cysteine at chiral kink sites on Au(110)-(1 x 2).
Enantiospecific adsorption of cysteine molecules onto chiral kink sites on the Au(110)-(1x2) surface was observed by scanning tunneling microscopy. l- and d-cysteine dimers were found to adopt distinctly different adsorption geometries at S kinks, which can be understood from the need to reach specific, optimum molecule-substrate interaction points. Extended, homochiral domains of l/d-cysteine were furthermore observed to grow preferentially from R/S kinks. The results constitute the first direct, microscopic observation of enantiospecific molecular interaction with chiral sites on a metal single-crystal surface.
Kühnle
Angelika
A
Interdisciplinary Nanoscience Center (iNANO), and Department of Physics and Astronomy, University of Aarhus, Denmark.
Linderoth
Trolle R
TR
Besenbacher
Flemming
F
D000327:Adsorption; D003545:Cysteine / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D013237:Stereoisomerism; D013499:Surface Properties
D006046:Gold; D003545:Cysteine