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Published online 3 September 2007 | Nature | doi:10.1038/news070903-1
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Magnets harnessed to clean artwork
Sponges filled with iron nanoparticles make lifting dirt easy.
When a priceless work of art becomes dirty, running it through the dishwasher obviously isn't an option. But even the most sensitive of modern cleaning techniques come with problems — which one researcher says he can solve with a gel sponge and a magnet.
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