What is nematic in chemistry?

: of, relating to, or being the phase of a liquid crystal characterized by arrangement of the long axes of the molecules in parallel lines but not layers — compare cholesteric, smectic.

What is meant by 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. The extent of the change in polarization depends on the intensity of an applied electric field .

What are smectic and nematic crystals?

The key difference between nematic smectic and cholesteric liquid crystals is their structure. Nematic liquid crystals have no ordered structure of molecules, and smectic liquid crystals have a layered molecular structure, whereas cholesteric liquid crystals have the molecules in a twisted and chiral arrangement.

What are nematic liquid crystals give some examples?

Nematic Liquid Crystals They have characteristic textures when viewed under cross polarized light microscope. These materials are birefringent and allowing light with different polarizations to go through at different speeds. Two examples are cyanobiphenyls and another with rigid and mantle group in the system.

What is the example of nematic liquid crystal?

What is nematic mesophase?

In the nematic mesophase, disk molecules tend to align with their symmetry axes parallel to each other and have spatial distribution of their centers of mass (Table 2). Disk-shaped molecules can be assembled in columns packed parallel on a two-dimensional (2D) lattice symmetry of the columnar packing.

What is the structure of nematic liquid crystal?

The general structure of nematic liquid crystal compounds is composed of aromatic cycles which are planar, rigid, and polarizable, connected by conjugated double bonds along the long axis of the molecule.

Which is the example of nematic liquid crystal?

What does smectic mean?

: of, relating to, or being the phase of a liquid crystal characterized by arrangement of molecules in layers with the long molecular axes in a given layer being parallel to one another and those of other layers and perpendicular or slightly inclined to the plane of the layer — compare cholesteric, nematic.

What is mesophase in liquid crystal?

The term mesophase is used to describe the “subphases” of liquid crystal materials. Mesophases are formed by changing the amount of order in the sample, either by imposing order in only one or two dimensions, or by allowing the molecules to have a degree of translational motion.