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We developed cavity-sealed single-layer graphene drum resonator by using low-pressure dry transfer technique, without using sacrificial layer etching process. Maximum diameter of 45 μm with gap length of 810 nm was obtained. Raman spectra of suspended graphene was found to be 2D/G ratio of 1.73 and few D peak. A dry transfer technique provides the flat device surface with sealed nanocavity, which...
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