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This anisotropic liquid is known as a liquid crystalline or mesomorphous state. Using DSC, it is possible to observe the small energy changes that occur as matter transitions from a solid to a liquid crystal and from a liquid crystal to an isotropic liquid.
Liquid crystal color transitions are used on many aquarium and pool thermometers as well as on thermometers for infants or baths. [84] Other liquid crystal materials change color when stretched or stressed. Thus, liquid crystal sheets are often used in industry to look for hot spots, map heat flow, measure stress distribution patterns, and so on.
A liquid crystal phase is thermotropic if its order parameter is determined by temperature. At high temperatures, liquid crystals become an isotropic liquid and at low temperatures, they tend to glassify. In a thermotropic crystal, those phase transitions occur only at temperature extremes; the phase is insensitive to concentration.
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A cholesteric liquid-crystal display (ChLCD) is a display containing a liquid crystal with a helical structure and which is therefore chiral. Cholesteric liquid crystals are also known as chiral nematic liquid crystals. They organize in layers with no positional ordering within layers, but a director axis which varies with layers.
A highly viscous cubic phase gel made of polysorbate 80, water, and liquid paraffin. Lyotropic liquid crystals result when amphiphiles, which are both hydrophobic and hydrophilic, dissolve into a solution that behaves both like a liquid and a solid crystal. This liquid crystalline mesophase includes everyday mixtures like soap and water. [1] [2]
Petrov was awarded the Freedericksz Medal for outstanding contributions in the field of liquid crystal physics by the Russian Liquid Crystal Society (2004), the Outstanding Contribution to Science Annual Award of the Ministry of Education and Science of Bulgaria (Scientist of the year 2007) and the Marin Drinov Sign of Honour of Bulgarian Academy of Sciences on a ribbon (2008).
The International Liquid Crystal Society (ILCS) was founded in 1990 and currently has over 900 members in 43 countries worldwide. [1] The ILCS was conceived in 1987 by Lui Lam and took three years to be founded at University of British Columbia, Vancouver, Canada, during the 13th International Liquid Crystal Conference. [ 2 ]