Print Email Facebook Twitter Graphene gas osmometers Title Graphene gas osmometers Author Dolleman, R.J. (TU Delft QN/Steeneken Lab; 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) Date 2016 Abstract We show that graphene membranes that separate two gases at identical pressure are deflected by osmotic pressure. The osmotic pressure is a consequence of differences in gas permeation rates into a few-layer graphene enclosed cavity. The deflection of the membrane is detected by measuring the tension-induced resonance frequency with an interferometric technique. Using a calibration measurement of the relation between resonance frequency and pressure, the time dependent osmotic pressure on the graphene is extracted. The time dependent osmotic pressure for different combinations of gases shows large differences that can be accounted for by a model based on the different gas permeation rates. In this way, a graphene-membrane based gas osmometer with a responsivity of ~60 kHz mbar–1 and nanoscale dimensions is demonstrated. Subject graphene, pressure sensor, gas sensor, osmosis, osmometer, selective permeation To reference this document use: http://resolver.tudelft.nl/uuid:103a4a17-6205-4494-8f6c-4196c03f2703 DOI https://doi.org/10.1088/2053-1583/4/1/011002 Embargo date 2017-10-26 ISSN 2053-1583 Source 2D Materials, 4 (1), 011002 1-7 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2016 R.J. Dolleman, S.J. Cartamil Bueno, H.S.J. van der Zant, P.G. Steeneken Files PDF osmosis_main.pdf 1.7 MB Close viewer /islandora/object/uuid:103a4a17-6205-4494-8f6c-4196c03f2703/datastream/OBJ/view