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Addressing a lattice of rotatable molecular dipoles with the electric field of an STM tip

Frauhammer, T.; Gerhard, L.; Edelmann, K.; Lindner, M.; Valášek, M.; Mayor, M.; Wulfhekel, W.

Abstract:
Functional molecular groups mounted on specific foot structures are ideal model systems to study intermolecular interactions, due to the possibility to separate the functionality and the adsorption mechanism. Here, we report on the rotational switching of a thioacetate group mounted on a tripodal tetraphenylmethane (TPM) derivative adsorbed in ordered islands on a Au(111) surface. Using low temperature scanning tunnelling microscopy, individual freestanding molecular groups of the lattice can be switched between two bistable orientations. The functional dependence of this rotational switching on the sample bias and tip–sample distance allows us to model the energy landscape of this molecular group as an electric dipole in the electric field of the tunnelling junction. As expected for the interaction of two dipoles, we found states of neighbouring molecules to be correlated.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130914
Veröffentlicht am 25.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Physikalisches Institut (PHI)
Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1463-9076, 1463-9084
KITopen-ID: 1000130914
Erschienen in Physical Chemistry Chemical Physics
Verlag Royal Society of Chemistry (RSC)
Band 23
Heft 8
Seiten 4874-4881
Nachgewiesen in Scopus
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