Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
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.