Photochromic materials can change color under stimulation of light. They are of high commercial importance for ophthalmic lens industry as also in sectors like optoelectronic switching devices, data storage, and optical transmission.
Nanotechnology deals with particles that are several thousand times smaller than a human hair, and it is being put to use in a variety of applications such as drug delivery and diagnostic tests.
Researchers from Finland and Taiwan have discovered how graphene, a single-atom-thin layer of carbon, can be forged into three-dimensional objects by using laser light.
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