This product contains WSe2 flakes solution in ethanol. The WSe2 solution has been developed by ultrasonic treatment of bulk WSe2 high quality crystals synthesized through vapor transport (CVT) technique. Since the starting material (CVT grown WSe2 crystals) is highly crystalline, ultrasonic treatment to delaminate WSe2 layers yields highly crystalline WSe2 mono-, few-, and some thick layers suspended in ethanol solution. The crystallinity of WSe2 nanomaterials has been confirmed through electron energy dispersive spectroscopy (EDAX), Raman spectroscopy (FWHM<6cm-1), and scanning electron microscopy (SEM) measurements. Depending on the thickness of the layers, flakes deposited on different substrates produce light emission (photoluminescence). Lateral sizes of WSe2 flakes deposited onto different substrates range from ~10nm - ~10 um while thickness range from 1L to 10s of layers.

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