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Uniaxial orientierte diskotische Systeme und ihre optoelektronischen Eigenschaften
Für Anwendungen kolumnar-diskotischer Flüssigkristalle ist eine genaue Kontrolle über die Orientierung der entstehenden Strukturen Grundvoraussetzung. Die vorgelegte Arbeit beschäftigt sich mit Möglichkeiten zur uniaxialen Orientierung dieser Flüssigkristallklasse sowohl in dünne...
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| Format: | Doctoral Thesis |
| Language: | German |
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Philipps-Universität Marburg
2004
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| Online Access: | PDF Full Text |
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For applications of columnar-discotic liquid crystals a control about the orientation of the structures is a basic requirement. The work presented here shows possibilities for uniaxial orientation of this class of liquid crystals in thin, macroscopic films as well as in nanostructures. A uniaxial in-plane orientation of columnar-discotic liquid crystals in thin films via spin-coating can be realised using PTFE-orientation layers. This is a simple film preparation method for unixially aligned columnar-discotic layers, which can be used in organic field effect transistors. Nanostructures with a uniaxial orientation of the columnar-discotic compound can be fabricated via wetting of nanoporous aluminium oxid membranes. This method allows for the preparation of uniaxially aligned nanorods and nanotubes.