Document Type
Article
Publication Date
3-27-2007
Keywords
Nanochemistry, Scanning tunneling microscopy, Supramolecular engineering, Surface chemistry, X-ray photoemission spectroscopy
Abstract
The engineering of complex architectures from functional molecules on surfaces provides new pathways to control matter at the nanoscale. In this article, we present a combined study addressing the self-assembly of the amino acid L-methionine on Ag(111). Scanning tunneling microscopy data reveal spontaneous ordering in extended molecular chains oriented along high-symmetry substrate directions. At intermediate coverages, regular biomolecular gratings evolve whose periodicity can be tuned at the nanometer scale by varying the methionine surface concentration. Their characteristics and stability were confirmed by helium atomic scattering. X-ray photoemission spectroscopy and high-resolution scanning tunneling microscopy data reveal that the L-methionine chaining is mediated by zwitterionic coupling, accounting for both lateral links and molecular dimerization. This methionine molecular recognition scheme is reminiscent of sheet structures in amino acid crystals and was corroborated by molecular mechanics calculations. Our findings suggest that zwitterionic assembly of amino acids represents a general construction motif to achieve biomolecular nanoarchitectures on surfaces.
Publication Title
Proceedings of the National Academy of Sciences of the United States of America
Volume
104
Issue
13
First Page
5279
Last Page
5284
Required Publisher's Statement
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/25427186
Recommended Citation
Riemann, Andreas; Schiffrin, Agustin; Auwarter, Willi; Pennec, Yan; Weber-Bargioni, Alex; Cossaro, Albano; Morgante, Alberto; and Barth, Johannes V., "Zwitterionic Self-Assembly of L-Methionine Nanogratings on the Ag(111) Surface" (2007). Physics & Astronomy. 5.
https://cedar.wwu.edu/physicsastronomy_facpubs/5
Subjects - Topical (LCSH)
Supramolecular chemistry; Self-assembly (Chemistry); Nanochemistry
Genre/Form
articles
Type
Text
Language
English
Format
application/pdf