  Direct growth of flat micrometer-sized bilayer graphene islands in between
molybdenum disulfide sheets is achieved by chemical vapor deposition of
ethylene at about 800 {\deg}C. The temperature assisted decomposition of
ethylene takes place mainly at molybdenum disulfide step edges. The carbon
atoms intercalate at this high temperature, and during the deposition process,
through defects of the molybdenum disulfide surface such as steps and wrinkles.
Post growth atomic force microscopy images reveal that circular flat graphene
islands have grown at a high yield. They consist of two graphene layers stacked
on top of each other with a total thickness of 0.74 nm. Our results demonstrate
direct, simple and high yield growth of graphene/molybdenum disulfide
heterostructures, which can be of high importance in future nanoelectronic and
optoelectronic applications.
