半胱氨酸单分散手性纳米团簇在Au(110)-(1×2)表面的自组装。

Self-assembly of monodispersed, chiral nanoclusters of cysteine on the Au(110)-(1 x 2) surface.

作者信息

Kühnle Angelika, Linderoth Trolle R, Besenbacher Flemming

机构信息

Interdisciplinary Nanoscience Center (iNANO), Center for Atomic-scale Materials Physics, and Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark.

出版信息

J Am Chem Soc. 2003 Dec 3;125(48):14680-1. doi: 10.1021/ja0377403.

DOI:10.1021/ja0377403

PMID:14640623

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.

摘要

通过扫描隧道显微镜（STM）观察到了单分散超分子纳米团簇的自组装过程。这些团簇由天然存在的氨基酸半胱氨酸在超高真空条件下通过气相沉积到Au(110)-(1×2)表面形成。对映体纯的l-和d-半胱氨酸产生具有镜像STM特征的团簇。外消旋的ld-半胱氨酸分离成同手性团簇，这证明了自组装过程中存在特定的分子间相互作用。