What are Liquid Crystals?
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Mesophases (liquid crystals and plastic crystals) are a state of order between crystals and liquids. They have imperfect long range orders of orientation and/or position. Thus, the can be fluid like a liquid and they can have anisotropic properties like crystals. Whereas the plastic crystals have a predominating positional order, the liquid crystals have a predominating orientational order.
The main reasons for the formation of liquid crystalline phases are:
The simplest liquid crystalline phases are the nematic phases, which have no positional order.
Smectic phases have layered structures.
The term liquid crystals covers a wide area of chemical structures, physical properties and technical applications.
Typical chemical structures are:
|Last Change: 5.8.2003, 04:24 pm by Volkmar Vill|
|Design: Matthias Vill 2003 | Contact: Volkmar Vill|