Researchers have succeeded in producing a coating material that can be written on using UV light and the writing erased again using oxygen. Changes to rewritable paper could help reduce paper waste in ...

Measuring the band gap of materials is vital in the nanomaterial, semiconductor, and solar industries. This article illustrates how the band gap of a material can be established from its UV absorption ...

Titanium dioxide—a white pigment that reflects and scatters UV light—is a powerful sunblock. But one crystalline form of the pigment commonly used in sunscreens reacts in sunlight to produce free ...