Layer-controlled large area MoS2 layers grown on mica substrate for surface-enhanced Raman scattering

Abstract Molybdenum disulfide has recently raised more and more interest due to its layer-related properties and potential applications in optoelectronics and electronics. Here, layer-controlled large-area and continuous MoS 2 atomic layers were obtained on mica substrate by thermally decomposing ammonium thiomolybdate. The obtained MoS 2 film is three layers uniformly. Because of the small lattice mismatch between MoS 2 and mica, the epitaxial MoS 2 film is well grown on the substrate. The as-grown MoS 2 /mica substrate is demonstrated to be suitable as a substrate for enhancing Raman signals of adsorbed molecules without any modification, which even can compare with graphene and will expand the application of MoS 2 to microanalysis.