Published in Chemistry World, 19 Jun 2009
Materials displaying ‘self-erasing’ colour images have been created by chemists in the US, who have studied how certain nanoparticles can assemble and disassemble themselves under different wavelengths of light.
The materials, which are printed with ultraviolet (UV) light and erased with visible light, could one day be used for self-expiring bus tickets or for carrying secret messages. […]
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