AVS 62nd International Symposium & Exhibition
    2D Materials Focus Topic Wednesday Sessions
       Session 2D+MN+NS+SP+SS+TF-WeM

Paper 2D+MN+NS+SP+SS+TF-WeM13
Gas Permeation Through 1 nm Thick Carbon Nanomembranes

Wednesday, October 21, 2015, 12:00 pm, Room 212C

Session: Mechanical and Thermal Properties of 2D Materials
Presenter: Armin Gölzhäuser, Bielefeld University, Germany
Authors: A. Beyer, Bielefeld University, Germany
M. Ai, Bielefeld University, Germany
S. Shishatskiy, Helmholtz-Zentrum Geesthacht, Germany
J. Wind, Helmholtz-Zentrum Geesthacht, Germany
X. Zhang, Bielefeld University, Germany
V. Chinaryan, Bielefeld University, Germany
Y. Yang, Bielefeld University, Germany
A. Gölzhäuser, Bielefeld University, Germany
Correspondent: Click to Email
The gas permeation characteristics of 1 nm thick carbon nanomembranes (CNMs) from self-assembled monolayers are reported. The assembly of CNMs onto polydimethylsiloxane (PDMS) support membranes allows determination of gas permeation characteristics. Single layer and triple layer CNMs were investigated in respect to permeation of hydrogen, helium, carbon dioxide, oxygen, nitrogen, argon, methane and ethane. In addition, the CNM-PDMS composites were characterized by X-ray photoelectron spectroscopy, helium-ion microscopy as well as atomic force microscopy. A careful analysis about the contribution of the PDMS support membranes to the gas permeation allowed an estimate of the intrinsic CNM permeances. These values indicate a molecular sieve-like property of CNMs which is attributed to molecular-sized channels in CNMs. As an example, hydrogen and carbon dioxide gas molecules display an order of magnitude higher permeance values for single layer CNMs in comparison to oxygen and nitrogen, which possess larger kinetic diameters.