Concurrent growth and formation of electrically contacted monolayer   transition metal dichalcogenides on bulk metallic patterns
  While new species and properties of two-dimensional (2D) materials are being reported with extraordinary regularity, a significant bottleneck in the field is the ability to controllably process material into working devices. We report a chemical vapor deposition process to selectively grow 2D material in a deterministic manner around lithographically defined bulk metallic patterns which concurrently provide as-grown contacts to the material. Monolayer films, with lateral extent of up to hundreds of microns are controllably grown on and around patterned regions of transition metals. By using different combinations of metallic pattern and oxide based precursor, heterostructured MoS2/WS2 growth has been observed as well. The materials display strong luminescence, monolayer Raman signatures, and relatively large crystal domains. In addition to producing high optical quality monolayer material deterministically and selectively over large regions, the metallic patterns remain conductive and therefore have the advantage of providing as-grown metallic contacts to the material, offering a path for simple device fabrication and large scale production 
Sudiksha Khadka, Miles Lindquist, Shrouq Aleithan, Ari Blumer, Thushan   Wickramasinghe, Martin Kordesch and Eric Stinaff
cond-mat.mtrl-sci