Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 45: Poster: Two Dimensional Functional Materials
CPP 45.2: Poster
Mittwoch, 9. März 2016, 18:15–21:00, Poster B2
Fabrication of functional carbon nanomembranes — •Katrin Wunderlich1, Polina Angelova2, Armin Gölzhäuser3, Markus Klapper1, and Klaus Müllen1 — 1Max Planck Institute for Polymer Research, Mainz, Germany — 2CNM Technologies GmbH, Bielefeld, Germany — 3University of Bielefeld, Department of Physics, Bielefeld, Germany
Carbon nanomembranes (CNMs) are important materials for technological applications e.g. filtration of gases or water purification.
Here, we report direct access to functional CNMs starting from small molecules. Three different types of molecules were synthesized: nonfused oligophenyl derivatives with a linear molecular backbone (biphenyl, para-triphenylene), condensed polycyclic precursors (naphthalene, anthracene) and bulky molecules (hexaphenylbenzene, hexa-peri-hexabenzocoronene). These aromatics on gold were crosslinked by electron irradiation and pyrolysis. Thus, homogeneous carbon nanomembranes with thicknesses of less than 0.8 nm were obtained.
The thickness, conductivity, chemical functionalization, and appearance of nanopores can be adjusted dependent on the molecule and the resistivity correlates with the thickness of the pyrolysed nanomembrane, with lower resistivity for the thicker sheets.