James Bond has always had a bunch of different spy gadgets and gadgets. And he clearly could use contact lenses with infrared vision. Such a thing may soon become a reality, thanks to engineers from the University of Michigan and a miracle material - graphene.
We know a lot about the capabilities of graphene itself, and amazing things can be done with it. In particular, this material can easily absorb light energy and emit many electrons. Unfortunately, graphene is a very thin material and cannot absorb much light. Therefore, the scientists decided to use two layers of graphene with a dielectric between them. When light hits the top layer of graphene, electrons pass through the dielectric to the bottom layer. This process increases the number of electrons by almost a hundred times, giving the phototransistor a sensitivity comparable to that of a digital camera.
But how does all of this help in making contact lenses? The point is that graphene is sensitive to many wavelengths of light. Including outside the visible spectrum. Currently, the prototype, created by scientists from Michigan, is sensitive to normal light and infrared rays. And because of its thickness, the technology is ideal for creating contact lenses. In addition to the obvious benefits of espionage, such lenses can be used in other industries, such as medicine.