What is liquid crystal PPT?
What is liquid crystal PPT?
PROPERTIES OF LIQUID CRYSTAL ▪ Liquid crystal can flow like a liquid, due to loss of positional order ▪ Liquid crystal is optically birefringent, due to its orientation order ▪ Transition from crystalline solids to liquid crystals caused by a change of temperature – gives rise to thermotropic liquid crystals – …
What is Metallotropic liquid crystals?
Metallotropic LCs are composed of both organic and inorganic molecules; their liquid-crystal transition depends not only on temperature and concentration, but also on the inorganic-organic composition ratio. Examples of liquid crystals can be found both in the natural world and in technological applications.
What are types of liquid crystals?
Classification of liquid crystals.
What are the applications of liquid crystal?
Liquid crystals are everywhere. They are used in all kinds of display devices including computer monitors and laptop screens, TVs, clocks, visors, and navigation systems. Each pixel in a monitor is an assembly of liquid crystals controlled by its own electromagnetic field.
What is smectic liquid crystal?
A “liquid crystal”- (LC) is an organic compound whose molecules align themselves with an applied electric field. Smectic liquid crystals consist of flat layers of cigar-shaped molecules with their long axes oriented perpendicularly to the plane of the layer.
What are the properties of liquid crystals?
Liquid crystal materials generally have several common characteristics. Among these are a rod-like molecular structure, rigidness of the long axis, and strong dipoles and/or easily polarizable substituents.
Which liquid crystals is highly viscous?
Liquid crystals (LC) are highly viscous, have specific properties such as optical properties and are organized at long distances.
What are properties of liquid crystals?
What are the three types of liquid?
Liquids can flow and assume the shape of their container.
- Water.
- Milk.
- Blood.
- Urine.
- Gasoline.
- Mercury (an element)
- Bromine (an element)
- Wine.
Is an example of smectic liquid crystal?
Smectic C is a smectic A like structure in which the long axes of the molecules of a tilted average angle differing from 90° with respect to the plane of the layer in a “bookshelf” arrangement.
What is liquid crystal and its types?
There are three basic types of thermotropic LCs, termed nematic, cholesteric, and smectic; nematic LCs are the most largely utilized at present. A major characteristic of all LC compounds is the rod-like shape of their molecules.
What is liquid crystal and its classification?
Liquid crystals are classified in many ways, molecules within the mesophases (mesogens) can be calamitic (rod-like), discotic (disc-like), amphiphilic, nonamphiphilic, metal containing, non-metal containing and low molecular weight or polymeric. Liquid crystals either show thermotropic behaviour or lyotropic behaviour.
What kind of phase is a liquid crystal?
LIQUID CRYSTALLINE PHASES Mesophase: A phase lying between solid and liquid.formed by changing amount of order in sample. Liquid crystal:fluid having properties associated to both crystal and liquid. Lyotropic: The liquid crystalline state may result when molecules are mixed with certain solvents or solids.
What are the applications of liquid crystal SlideShare?
Chemistry did solve our problem of displays, polarizer, and many applications of liquid crystal Chemistry did solve our problem of displays, polarizer, and many applications of liquid crystal Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
When does a compound go into a liquid crystalline state?
Lyotropic: The liquid crystalline state may result when molecules are mixed with certain solvents or solids. Thermotropic : The liquid crystalline state may result when the compound is heated. 6 7.
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