Researchers at Rensselaer Polytechnic Institute (RPI) have developed a method to isolate thin layers of tungsten diselenide (WSe2) — a 2D material — from crystals, to allow layers of WSe2 to be stacked on top of other atomically thin materials such as boron nitride and graphene. The discovery could further the use of WSe2 for building smaller, more efficient computing devices. When the WSe2 layer is sandwiched between two boron nitride flakes and interacts with light, an exciton is formed. 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