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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: Interfaces and Thin Films I

CPP 11.7: Vortrag

Montag, 31. März 2014, 18:00–18:15, ZEU 114

Gas permeation of carbon nanomembranes — •Vahe Chinaryan¹, Min Ai¹, Sergey Shishatskiy², Jan Wind², Xianghui Zhang¹, Christoph T. Nottbohm¹, Nils Mellech¹, Andreas Winter¹, Henning Vieker¹, Jun Qiu³, Karl-Josef Dietz⁴, Armin Gölzhäuser¹, and Andre Beyer¹ — ¹Physics of Supramolecular Systems, University of Bielefeld, 33615 Bielefeld, Germany — ²Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany — ³Performance Materials-Chemistry & Technology, DSM, 6160 MD Geleen, The Netherlands — ⁴Plant Biochemistry and Physiology, University of Bielefeld, 33615 Bielefeld, Germany

Gas permeation characteristics of carbon nanomembranes (CNMs) from self-assembled monolayers are reported for the first time. The assembly of CNMs onto polydimethylsiloxane (PDMS) support membranes allows determination of gas permeation characteristics. Single layer and triple layer CNMs with thicknesses of 1 nm and 3 nm 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.