Monday, November 29, 1999

Gold particles to drive cheap TVs, PCs

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Now, a new way to disperse gold particles through plastic!Scientists have discovered a new way to disperse gold nanoparticles through plastic, which they claim could make possible a lot of unusual materials such as durable paint, faster computers and cheaper TV sets.Adrian Fuchs of Queensland University of Technology, who led an team which found the new method, said the technique he developed was a model for dispersing metals in nanoparticle form throughout polymers or plastic materials."The properties of metals change when they are in nano form and so combining unique property of nanoparticles with plastic leads to a whole new range of composite materials that could be used for novel catalysts, drug delivery and coatings."Paint is essentially a plastic so when gold nanoparticles are added it makes colours more intense across the whole visible spectrum. The paint would also be more durable when exposed to a harsh environment," Dr Fuchs said.According to the scientists, gold has good conductivity and becomes a useful catalyst when mixed with different metals."If you put gold nanoparticles with titanium dioxide using a plastic mould, you can make a very efficient catalyst to purify water; the titania absorbs the light and converts it into electricity which is then passed into the conductive gold," he said.Dr Fuchs said his method for dispersing nanoparticles through plastic could also be applied to encapsulating drugs into plastic casings so that they could be ingested and used for cancer detection and destruction.

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