Am Donnerstag, 15. Dezember, hält Prof. Dr. André Beyer von der Universität Bielefeld im Hörsaal A1 der Universität Paderborn ab 16.15 Uhr einen Vortrag zum Thema „Kohlenstoff-Nanomembranen – Physik und Anwendung“. Der Vortrag wird auf Englisch gehalten. Alle Interessierten sind eingeladen. Ab 15.45 Uhr stehen Heißgetränke und Gebäck für das Publikum vor dem Hörsaal bereit.
„Physics and Applications of Carbon Nanomembranes“
The collective “single-file” motion of water molecules through natural and artificial nanoconduits inspires the development of high-performance membranes for water separation. In my talk, I will discuss the advantages of such transport mechanism in comparison to conventional polymer separation membranes, which are governed by the solution-diffusion mechanism. A seemingly ideal material with artificial nanoconduits are carbon nanomembranes (CNMs) which combine an extremely high areal density of nanoconduits with a remarkable ion rejection. I will sketch the development of CNMs which are made by cross-linking self-assembled monolayers via exposure with low-energy electrons. Characterization of 1.2 nm thick CNMs reveals an extremely high water permeance of about 700 LMH/bar (≈ 10-4 mol m-2 s-1 Pa-1) as well as a remarkable high ion resistance that is comparable to values of pure planar lipid bilayers. Forward osmosis experiments with ions demonstrate a remarkable performance of these ultrathin membranes.
