The work reported by the Nanjing-ANU-Wisconsin team offers a nice win for the optoelectronic potential of 2-D semiconductor heterostructures. But how the inorganic part of those structures was made—laborious mechanical exfoliation of MoSe2 flakes—remains a problem for scaling such structures up to commercial use. To get past that roadblock to commercialization, researchers at the Massachusetts Institute of Technology, Georgia Tech, the University of Virginia and the University of Notre Dame, and Yonsei University, South Korea, looked at a very different approach, which the team believes c...