News

Polystyrene nanosphere dyes

Polystyrene nanospheres replace toxic dyes to produce structural colours

With increasing concerns about the use of traditional dyes on the environment, materials that use polysytene nanospheres rather than toxic dyes to produce colour have been the subject of research by scientists at the University of Southampton, UK. The sphere size controls the wavelength which light is reflected and scattered from the film, offering new possibilities for structural colours. The materials have already attracted the interest of Unilever, Kodak, Merck and Degussa for applications ranging from packaging to automotives.

Heating up austenitic stainless steels

Researchers at Oak Ridge National Laboratory, USA, claim to have developed inexpensive austenitic stainless steels that can withstand higher temperatures while maintaing creep strength and oxidation resistance by introducing aluminium into composition. The drive towards higher operating temperatures, while maintaining creep stremnght and oxidation resistance by introducing aluminium into its composition. that employ austenitic stainless steels in turbine recuperators, heat exchangers, piping and tubing.

Safety films for batteries

Electrode separators made from porous polymers that help prevent lithium-ion batteries from exploding at high temperatures have been created by Tonen Chemical Corporation, in Japan. This could help use of batteries in hyybrid and electric vehicles.
Supraspheres

Mouldable metals' created using nanocrystals

A method of assembling metal nanoparticles into a clay-like structure that can be moulded and fired has been developed by researchers at Northwestern University, Chicago, USA. Paternal applications include flexible electronics.
Plasma-coated stent

3D plasma coating technique prevents stents from clogging

Researchers at the University of Ulster, UK, have developed a 3D plasma coating technique to prevent stents from developing neointima, where thick muscle tissue grows over the surface, leading to the blood vessel narrowing again. Thin films of carbon, ceramics and platinum are coated using the new method to prevent clogging.

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