TunableGlass
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Nanowires could bring 'tunable' privacy glass to the masses
If you don't want to block light but still need privacy, a discovery from Harvard might let you ditch the window coverings. Researchers at the university's engineering school have developed glass that changes from transparent to translucent at the flick of a switch. Such "tunable windows" aren't new, but commercial models are currently expensive and slow. The new material, however, can transform from clear to cloudy in less than a second and should be cheap to produce.
