What are liquid crystals discuss their classification and applications?
What are liquid crystals discuss their classification and applications?
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.
How many types of liquid crystals do you know explain with their application?
There are three types of thermotropic liquid crystals: discotic, conic (bowlic), and rod-shaped molecules. Discotics are disc-like molecules consisting of a flat core of adjacent aromatic rings, whereas the core in a conic LC is not flat, but is shaped like a rice bowl (a three-dimensional object).
What are the applications of liquid crystal in pharmaceutical industry?
LCs based delivery systems such as gels, cream, ointment, liposomes, colloidal dispersions and transdermal patches have been used in pharmaceuticals and cosmetics. Non-pharma applications of liquid crystals involves-liquid crystal displays, liquid crystal thermometers and optical imaging.
Which type of liquid crystal is used for tumor detection?
A group of investigators exploited the use of the liquid crystal 5CB (4-Cyano-4′-pentylbiphenyl, chemical structure shown in Figure 4) as a sensing substance to identify biomolecules. LC-based biosensors have been the center of attention in cancer diagnosis [23,24,25,26,51,52,53,54,55,56,57,58].
What are the different applications of LCD display?
LCDs are used in a wide range of applications, including LCD televisions, computer monitors, instrument panels, aircraft cockpit displays, and indoor and outdoor signage.
What are 5 examples of liquids?
Examples of Liquids
- Water.
- Milk.
- Blood.
- Urine.
- Gasoline.
- Mercury (an element)
- Bromine (an element)
- Wine.
What type of liquid crystals are used in medical field?
Most of the thermotropic liquid crystals are composed of rod-like molecules and classified into three types, nematic, smectic and cholesteric (Figure 2).
Which pharma drug exist as liquid crystal?
Introduction
| Drug Substances Forming LCs | Category | Type of Liquid Crystals |
|---|---|---|
| Diclofenac | NSAID | Lamellar, lyotropic LCs |
| Leukotriene | Anti-inflammatory | Thermotropic LCs |
| Cromolyn | Antiasthmatic | Cholesteric lyotropic LCs or smectic thermotropic LCs |
| Cyclosporine | Immunosuppresive | Smectic thermotropic LCs |
Is P Azoxyanisole liquid crystal?
In a solid state, it appears as a white powder, but when heated it forms a liquid crystal. Its liquid crystal range is from 118 °C to 136 °C. The solid to nematic transition is at 118 °C and the nematic to isotropic liquid transition at 136 °C.
What is a nematic crystal?
A nematic liquid crystal is a transparent or translucent liquid that causes the polarization (that is, the focusing in a plane) of light waves to change as the waves pass through the liquid. Nematic liquid crystals are used in twisted nematic display s, the most common form of liquid crystal display .
What are the applications of liquid crystal display?
LCDs are commonly used for portable electronic games, as viewfinders for digital cameras and camcorders, in video projection systems, for electronic billboards, as monitors for computers, and in flat-panel televisions.
What is liquid crystal technology?
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly, instead using a backlight or reflector to produce images in color or monochrome.