Researchers in the US and the UK have succeeded in synthesizing high-quality 2D semiconductor heterojunctions between monolayers of molybdenum selenide and tungsten selenide – two new and technologically important materials. The junctions are the 2D analogues of epitaxial 3D semiconductor heterostructures, which make up most modern light-emitting diodes, lasers and high-speed transistors….
http://nanotechweb.org/cws/article/tech/58453