Graphene gas osmometers

Journal article (2016)

Authors

R.J. Dolleman QN/Steeneken Lab - AS , Kavli institute of nanoscience Delft
S.J. Cartamil Bueno QN/Steeneken Lab - AS , Kavli institute of nanoscience Delft
H.S.J. van der Zant QN/van der Zant Lab - AS , Kavli institute of nanoscience Delft
P.G. Steeneken QN/Steeneken Lab - AS , Kavli institute of nanoscience Delft
Research Group
QN/Steeneken Lab (AS) (TU Delft)
Copyright: © 2016 R.J. Dolleman, S.J. Cartamil Bueno, H.S.J. van der Zant, P.G. Steeneken
DOI
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https://doi.org/10.1088/2053-1583/4/1/011002
Graphene, pressure sensor, gas sensor, osmosis, osmometer, selective permeation
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Published Date

2016

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Steeneken Lab

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.

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