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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