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A liquid crystal (LC) is thermotropic if the order of its components is determined or changed by temperature.
Additional recommended knowledge
If temperature is too high, the rise in energy and therefore in motion of the components will induce a phase change: the LC will become an isotropic liquid. If, on the contrary, temperature is too low to support a thermotropic phase, the LC will become a crystal.
There is therefore a range of temperatures at which we observe thermotropic LCs; and most of these have several "subphases" (nematic, smectic...), which we may observe by modifying the temperature.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Thermotropic_crystal". A list of authors is available in Wikipedia.|