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- Artigo de eventoSynthesis and Characterization of MoS2/WS2 Heterostructures by Second Harmonic GenerationVianna P.G.; Hamza Safeer S.; Ore A.S.M.V.; Gordo V.O.; Carvalho I.C.S.; Carozo V.; De Matos C.J.S. (2019)© 2019 IEEE.Monolayers of MoS2 and WS2, as well as their vertical heterostructures, were synthesized via chemical vapor deposition. The samples were then characterized via microRaman and micro-photoluminescence spectroscopies, and by second harmonic generation (SHG). SHG confirms that the layers in bilayers and heterostructures grow with ~0o (or ~60o) relative twist angle. Interestingly, SHG is observed in MoS2 bilayers, indicating a deviation from the centrosymmetric 2H phase.