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photoswitch
A photoswitch, or photo-electric switch, is a sensor that detects the presence in or change of light. A popular example is that of azobenzene. Photoswitches are one type of molecular machines, a class of molecules that can be switched between at least two distinct thermodinamically stable forms by the application of an external stimulus. Development of such devices is crucial in the framework of the field of nanotechnology: nowadays photoswitches are used in a variety of places from scientific applications to residential light timers.
== Chemistry ==
A photoswitch molecule is a chemical that is sensitive in some way to light, e.g. able to turn on retina cells when exposed to light,.〔(【引用サイトリンク】title=Kramer Lab )〕 Some examples include AAQ, DENAQ, photochromic compounds, azobenzenes, spiropyrans, diaryletenes, fulgides, overcrowded alkenes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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