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Hai Li, Gang Lu, Yanlong Wang, Zongyou Yin, Chunxiao Cong, Qiyuan He, Lu Wang, Feng Ding, Ting Yu and Hua Zhang Mechanical Exfoliation and Characterization of Single- and Few-Layer Nanosheets of WSe2, TaS2, and TaSe2 Small 9

Article first published online: 27 DEC 2012 | DOI: 10.1002/smll.201202919

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A Raman microscope is employed to characterize 1L-5L WSe2 nanosheets and single crystals. A new peak around 308 cm−1 is observed. Red shifting of the A1g mode and the Raman peak around 308 cm−1 is observed from 1L-5L WSe2. Hexagonal- and monoclinic-structured WO3 thin films are obtained during the local oxidation of 1L-3L and 4L-5L WSe2 nanosheets.

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