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Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation (Articolo in rivista)

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Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation (Articolo in rivista) (literal)

Anno

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Alternative label

Smerieri M. ab; Vattuone L. ab; Costa D. c; Tielens F. de; Savio L. b (2010)
Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation
in Langmuir; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
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In: Langmuir, vol. 26 (10) pp. 7208 - 7215. American Chemical Society, 2010. (literal)

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Note

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a Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy; b IMEM-CNR, Via Dodecaneso 33, 16146 Genova, Italy; c Laboratoire de Physico-Chimie des Surfaces, ENSCP, ParisTech, 11 rue Pierre et Marie Curie, F-75005 Paris, France; d UPMC, Univ Paris 06, Laboratoire de Réactivité de Surface, 4, Place Jussieu, F-75005 Paris, France; e CNRS, UMR 7609, Laboratoire de Réactivité de Surface, 4, Place Jussieu, F-75005 Paris, France (literal)

Titolo

Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation (literal)

Abstract

Self-assembly of organic molecules at metal surfaces is of greatest importance in nanoscience; in fact, it opens new perspectives in the field of molecular electronics and in the study of biocompatible materials. Combining an experimental low-temperature scanning tunneling microscopy investigation with ab initio calculations, we succeeded to describe in detail (S)-glutamic acid adsorption on Ag(100) at T=350 K. We find that (S)-glutamic acid organizes in a squared structure and, at variance with the majority of cases reported in literature, it adsorbs in the neutral form, 4.6A ° above the surface plane. The interaction with the poorly reactive Ag substrate is only due to weak van der Waals forces, while H-bonds between carboxyl groups and the formation of aOCOH-OCOH-OCOH-OCOH cycle at the vertex of the squares are the main responsible for the self-assembly. (literal)

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