Journal Article

PreJuSER-16723

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dihydroxy (4-thiomorpholinomethyl) benzoic acids - From molecular asymmetry to diode characteristics

Lennartz, M. C.FZJ* ; Baumert, M. ; Karthäuser, S.FZJ* ; Albrecht, M. ; Waser, R.FZJ*

2011
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/la201206e

Abstract: One of the challenges in molecular electronics is to design molecules which can be used as functional units in electronic devices. The subject of our investigations is an asymmetrical molecule, dihydroxy(4-thiomorpholinomethyl)benzoic acid (TMBA), whose structural and electronic properties are characterized. The self-assembly behavior of TMBA on Au(111) surfaces resulting in highly ordered monolayers is obtained using scanning tunneling microscopy (STM). Furthermore, investigations on the electronic properties of the combined metal/molecule system reveal an orbital mediated tunneling process and tunneling decay constants for the carboxylic and thiomorpholino group. Thus, a diode-like character of TMBA is shown to be caused by intrinsic electronic properties of different molecular moieties.

Keyword(s): J

Note: This work was funded by the DFG (Grant SPP1243). We thank P. Kowalzik for the preparation of the gold samples and A. Besmehn for the execution of the XPS measurements.

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Contributing Institute(s):

1. Elektronische Materialien (PGI-7)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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