Engineering

Researchers zoom in on battery wear and tear

From the moment you first use it, a new lithium-ion battery is degrading. After a few hundred charge cycles, you'll notice—your phone, laptop or electric car battery wears out more quickly. Eventually, it stops holding ...

Electronics & Semiconductors

New 2-D Ruddlesden-Popper (RP) layered perovskite-based solar cells

In recent years, researchers worldwide have been trying to develop solar cells and other technologies that can produce electrical energy from renewable sources, as these could reduce the emission of greenhouse gases and thus ...

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Thin layer chromatography

Thin layer chromatography(TLC) is a chromatography technique used to separate mixtures. Thin layer chromatography is performed on a sheet of glass, plastic, or aluminum foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide, or cellulose. This layer of adsorbent is known as the stationary phase.

After the sample has been applied on the plate, a solvent or solvent mixture (known as the mobile phase) is drawn up the plate via capillary action. Because different analytes ascend the TLC plate at different rates, separation is achieved..

Thin layer chromatography finds many applications, including:

A number of enhancements can be made to the original method to automate some steps, to increase the resolution achieved with TLC and to allow more accurate quantitation. This method is referred to as HPTLC, or "high performance TLC".

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