Print Email Facebook Twitter Sealing graphene nanodrums Title Sealing graphene nanodrums Author Lee, M. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Davidovikj, D. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Sajadi, B. (TU Delft Dynamics of Micro and Nano Systems) Siskins, M. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Alijani, F. (TU Delft Dynamics of Micro and Nano Systems) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Steeneken, P.G. (TU Delft Dynamics of Micro and Nano Systems; TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Date 2019 Abstract Despite theoretical predictions that graphene should be impermeable to all gases, practical experiments on sealed graphene nanodrums show small leak rates. Thus far, the exact mechanism for this permeation has remained unclear, because different potential leakage pathways have not been studied separately. Here, we demonstrate a sealing method that consists of depositing SiO2 across the edge of suspended multilayer graphene flakes using electron beam-induced deposition. By sealing, leakage along the graphene-SiO2 interface is blocked, which is observed to result in a reduction in permeation rate by a factor of 104. The experiments thus demonstrate that gas flow along the graphene-SiO2 interface tends to dominate the leak rate in unsealed graphene nanodrums. Moreover, the presented sealing method enables the study of intrinsic gas leakage through graphene membranes and can enable hermetic graphene membranes for pressure sensing applications. Subject electron beam induced deposition (EBID)graphenemembranepermeabilitypressure sensorsealing To reference this document use: http://resolver.tudelft.nl/uuid:d50c5be5-1661-4ed7-9f8b-fce164c2af2c DOI https://doi.org/10.1021/acs.nanolett.9b01770 ISSN 1530-6984 Source Nano Letters: a journal dedicated to nanoscience and nanotechnology, 19 (8), 5313-5318 Part of collection Institutional Repository Document type journal article Rights © 2019 M. Lee, D. Davidovikj, B. Sajadi, M. Siskins, F. Alijani, H.S.J. van der Zant, P.G. Steeneken Files PDF acs.nanolett.9b01770.pdf 2.81 MB Close viewer /islandora/object/uuid:d50c5be5-1661-4ed7-9f8b-fce164c2af2c/datastream/OBJ/view