STM study of oligo(phenylene-ethynylene)s

Thiele, Cornelius and Gerhard, Lukas and Eaton, Thomas R. and Torres, David Muñoz and Mayor, Marcel and Wulfhekel, Wulf and Löhneysen, Hilbert v and Lukas, Maya. (2015) STM study of oligo(phenylene-ethynylene)s. New journal of physics, 17 (5). 053043.

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Official URL: http://edoc.unibas.ch/40734/

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A detailed scanning tunneling microscopy (STM) study of two variants of oligo(phenylene ethynylene) (OPE) molecules is presented. These molecules might serve as molecular wires up to ? 5 nm in length. Self-assembled arrangements as well as single molecules on a Au(111) surface were analyzed. The molecular orbitals were directly imaged and are compared to density functional theory calculations. Sub-molecular resolution images of both molecules directly display the chemical structure. One of the OPE variants was lifted off the surface by the STM tip to measure the single-molecule conductance in order to explain previously reported low conduction values. Furthermore, we present a detailed analysis of a tip-induced conformational switching of the hexyl side groups from all-trans to a nonlinear conformation, which was observed for both variants.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Molecular Devices and Materials (Mayor)
UniBasel Contributors:Mayor, Marcel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:30 Jun 2016 11:01
Deposited On:27 Apr 2016 14:38

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