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Tailoring supramolecular assemblies on a metal surface by specifically functionalized porphyrins

Wintjes, Nikolai. Tailoring supramolecular assemblies on a metal surface by specifically functionalized porphyrins. 2007, Doctoral Thesis, University of Basel, Faculty of Science.

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Official URL: http://edoc.unibas.ch/diss/DissB_8111

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Abstract

The self-assembly behavior of porphyrin derivatives bearing di�erent substituents
is investigated on metal surfaces by Scanning Tunneling Microscopy
(STM). Di�erent methods to control the self-assembly process by skillful
changes of the molecular substituents are developed. It is shown how onedimensional
wires as well as two-dimensional nanoporous networks can be
formed by the same molecular compound depending on the coverage. The
nanoporous networks can be altered in their pore characteristics and poreto-
pore distances in a controlled way. This is exploited to form a fully selfassembled
supramolecular device. The characteristics of the device are studied
in detail and it is shown that it can be operated by the tip of an STM.
Finally, bimolecular systems are investigated. Here it is shown how the need
to balance losses of entropy which is a common factor in all self-assembled
networks, can be exploited to direct the self-assembly of such systems to form
either separated phases or an intermixed network.
Advisors:Güntherodt, Hans-Joachim
Committee Members:Jung, Thomas Andreas and Spillmann, Hannes
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Experimentelle Physik (Güntherodt)
UniBasel Contributors:Güntherodt, Hans-Joachim
Item Type:Thesis
Thesis Subtype:Doctoral Thesis
Thesis no:8111
Thesis status:Complete
Bibsysno:Link to catalogue
ISBN:978-3-86727-476-0
Number of Pages:84
Language:English
Identification Number:
Last Modified:22 Apr 2018 04:30
Deposited On:13 Feb 2009 16:19

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