Self-assembly of monodispersed, chiral nanoclusters of cysteine on the Au(110)-(1 x 2) surface |
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| Authors: | Kühnle Angelika Linderoth Trolle R Besenbacher Flemming |
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| Institution: | Interdisciplinary Nanoscience Center (iNANO), Center for Atomic-scale Materials Physics, and Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark. |
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| Abstract: | The self-assembly of monodispersed supramolecular nanoclusters was observed by scanning tunneling microscopy (STM). The clusters form from the naturally occurring amino acid cysteine by vapor deposition onto the Au(110)-(1 x 2) surface under ultrahigh vacuum conditions. Enantiomerically pure l- and d-cysteine yields clusters with mirror-image STM signatures. Racemic ld-cysteine segregates into homochiral clusters, evidencing specific intermolecular interactions during the self-assembly process. |
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