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Aufbau eines kombinierten Rasterkraft-/ Rastertunnelmikroskops und rasterkraftmikroskopische Untersuchungen an Thiophenverbindungen

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vts_6725_9257.pdf (5.928Mb)
109 Seiten
Veröffentlichung
2009-02-21
Authors
Sperka, Frank A.
Dissertation


Faculties
Fakultät für Naturwissenschaften
Abstract
In this work the self-assembly properties of Thiophen-compounds on Mica and HOPG (Highly Ordered Pyrolythic Graphite) were studied. The samples were prepared in different techniques like drop-casting and spin-coating, the characterization of these thin films was done by Atomic Force Microscope (AFM) measurements in tapping mode. In detail two compounds of the Dihexyl-Ethylendioxythiophenes and one dendritic compound consisting of 90 Thiophenes were investigated. For those systems the long distance behaviour of the adsorbed molecules was investigated with AFM-measurements. Furthermore a combined Atomic-Force-/Scanning-Tunneling-Microscope (STM) was built up and was put into operation successfully. With this device one is able to obtain simultaneously not only the topography but also the local conductivity with one scan. The distance-control switches automatically between tunneling-current-control and force-control. This combined AFM/STM is an ideal tool for characterizing systems whose conductivity varies lateraly too much for stable STM-measurements in air.
Date created
2008
Subject headings
[GND]: Organischer Halbleiter | Rasterkraftmikroskop | Rastertunnelmikroskop | Thiophen
[LCSH]: Scanning electron microscopy | Scanning force microscopy
[DDC subject group]: DDC 530 / Physics
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Standard (Fassung vom 01.10.2008)
https://oparu.uni-ulm.de/xmlui/license_v2

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DOI & citation

Please use this identifier to cite or link to this item: http://dx.doi.org/10.18725/OPARU-1196

Sperka, Frank A. (2009): Aufbau eines kombinierten Rasterkraft-/ Rastertunnelmikroskops und rasterkraftmikroskopische Untersuchungen an Thiophenverbindungen. Open Access Repositorium der Universität Ulm und Technischen Hochschule Ulm. Dissertation. http://dx.doi.org/10.18725/OPARU-1196
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