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O: Fachverband Oberflächenphysik

O 77: 2D Materials Beyond Graphene IV

O 77.1: Hauptvortrag

Mittwoch, 22. März 2017, 15:00–15:30, WIL A317

Carbon Nanomembranes (CNM) : 2D Materials Beyond Graphene — •Armin Gölzhäuser — Universität Bielefeld, Physik Supramolekularer Systeme und Oberflächen, Universitätsstr. 25, 33615 Bielefeld

Carbon Nanomembranes (CNMs) are thin (~1nm), synthetic two-dimensional (2D) layers or sheets with tailored physical, chemical or biological function [1]. Their fabrication scheme utilizes a sequence of molecular monolayer assembly on a solid surface and radiation induced cross-linking in two dimensions. The cross-linked 2D-layer is then released from the surface, forming a self-supporting nanomembrane with properties that are determined by properties of the monolayer. Depending on the desired applications, CNMs can be engineered with a controlled thickness, elasticity and surface functionalization. Helium ion microscopy, spectroscopic methods and functional tests are applied to investigate the structure and composition as well as permeation properties. Helium Ion Lithography is used the fabrication of well-defined nanopores [2] and perforated CNMs are tested as ballistic membranes for the separation of gases and liquids.

[1] A. Turchanin and A. Gölzhäuser: Carbon Nanomembranes, Adv. Mater. 28, 6075 (2016).

[2] D. Emmrich, A. Beyer, A. Nadzeyka, S. Bauerdick, J. C. Meyer, J. Kotakoski and A. Gölzhäuser: Nanopore fabrication and characterization by helium ion microscopy, Applied Physics Letters 108, 16310 (2016).