English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/160849
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Coupling between organic molecules and dangling bonds on Ge(001):H

AuthorsGarcía-Lekue, Aran; Engelund, Mads; Godlewski, Szymon; Kolmer, Marek; Zuzak, Rafał; Echavarren, Antonio M.; Sánchez-Portal, Daniel ; Szymonski, Marek
Issue Date2016
PublisherCSIC-ICN Centro de Investigación en Nanociencia y Nanotecnología (CIN2)
CitationFuerzas y Túnel (2016)
AbstractControlling the coupling between single-molecules and dangling-bonds (DBs) on hydrogenpassivated semiconductor surfaces is of relevance from both technological and fundamental perspectives. Furthermore, DBs can be patterned on these surfaces with atomic precision by STM tip induced desorption of the hydrogen atoms from the passivated layer. This opens up the possibility to tune the properties of the molecules by contacting them with DB arrays of different complexity. With this in mind, we have investigated the interaction of a conjugated polyaromatic molecule (trinaphthylene, Y molecule) with a single-DB or a DB dimer on the hydrogenated Ge(001):H surface. Using Scanning Tunneling Microscope (STM) and Spectroscopy (STS) experiments combined with theoretical calculations, we have found significantly different results in each case. Y molecules interact weakly with the hydrogen-passivated surface, and are nearly decoupled from the substrate states. As a result, the electronic structure of the molecule positioned on the single DB is similar to the gas phase electronic structure. On the contrary, the formation of chemical bonds following the Diels-Alder addition for Y molecules attached to surface DB dimers results in a significant change of the molecular electronic structure. Our results show that the strength of the coupling between the molecule and the substrate could be tuned by creating complex arrays comprising both single and dimerized DBs.
DescriptionResumen del póster presentado a la 10th Conferencia Fuerzas y Túnel, celebrada en Girona (España) del 5 al 7 de septiembre de 2016.-- et al.
Appears in Collections:(CFM) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.