Print Email Facebook Twitter Visualizing the Motion of Graphene Nanodrums Title Visualizing the Motion of Graphene Nanodrums Author Davidovikj, D. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Slim, J.J. (TU Delft QN/Mol. Electronics & Devices; Kavli institute of nanoscience Delft) Cartamil Bueno, S.J. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Steeneken, P.G. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Venstra, W.J. (TU Delft QN/Afdelingsbureau; Kavli institute of nanoscience Delft) Date 2016 Abstract Membranes of suspended two-dimensional materials show a large variability in mechanical properties, in part due to static and dynamic wrinkles. As a consequence, experiments typically show a multitude of nanomechanical resonance peaks, which make an unambiguous identification of the vibrational modes difficult. Here, we probe the motion of graphene nanodrum resonators with spatial resolution using a phase-sensitive interferometer. By simultaneously visualizing the local phase and amplitude of the driven motion, we show that unexplained spectral features represent split degenerate modes. When taking these into account, the resonance frequencies up to the eighth vibrational mode agree with theory. The corresponding displacement profiles, however, are remarkably different from theory, as small imperfections increasingly deform the nodal lines for the higher modes. The Brownian motion, which is used to calibrate the local displacement, exhibits a similar mode pattern. The experiments clarify the complicated dynamic behavior of suspended two-dimensional materials, which is crucial for reproducible fabrication and applications. Subject Graphene; interferometry; mode shape; NEMS To reference this document use: http://resolver.tudelft.nl/uuid:7914a78e-6740-4680-a8d1-f1c16de16fd1 DOI https://doi.org/10.1021/acs.nanolett.6b00477 Embargo date 2017-03-08 ISSN 1530-6984 Source Nano Letters: a journal dedicated to nanoscience and nanotechnology, 16, 2768-2773 Part of collection Institutional Repository Document type journal article Rights © 2016 D. Davidovikj, J.J. Slim, S.J. Cartamil Bueno, H.S.J. van der Zant, P.G. Steeneken, W.J. Venstra Files PDF Visualizing_graphene_moti ... _final.pdf 4.69 MB Close viewer /islandora/object/uuid:7914a78e-6740-4680-a8d1-f1c16de16fd1/datastream/OBJ/view