| Zugriffsnummer | 43394 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Bottom up synthesis of graphene monolayers with tunable crystallinity and porosity |
| Autor(in); Institution |
Neumann, Christof; Friedrich Schiller University Jena, Institute of Physical Chemistry, Jena, GERMANY
Kaiser, David; Friedrich Schiller University Jena, Institute of Physical Chemistry, Jena, GERMANY
Mohn, Michael J.; Ulm University, Central Facility of Electron Microscopy, Ulm, GERMANY
Füser, Matthias; University of Frankfurt, Institute of Inorganic and Analytical Chemistry, Frankfurt, GERMANY
Weber, Nils-Eike; Bielefeld University, Faculty of Physics, Bielefeld, GERMANY
Reimer, Oliver; Bielefeld University, Faculty of Physics, Bielefeld, GERMANY
Gölzhäuser, Armin; Bielefeld University, Faculty of Physics, Bielefeld, GERMANY
Weimann, Thomas; 2.4, Quantenelektronik, PTB-Braunschweig
Terfort, Andreas; University of Frankfurt, Institute of Inorganic and Analytical Chemistry, Frankfurt, GERMANY
Kaiser, Ute; Ulm University, Central Facility of Electron Microscopy, Ulm, GERMANY
Turchanin, Andrey A.; Friedrich Schiller University Jena, Institute of Physical Chemistry, Jena, GERMANY; Jena Center for Soft Matter (JCSM), Jena, GERMANY; Center of Energy and Environmental Chemistry (CEEC Jena), Jena, GERMANY
|
| Quelle/Jahr | ACS Nano: 13 (2019), 6, 7310 - 7322 |
| ISSN | 1936-0851 (PRINT) ; 1936-086X (ONLINE) |
| DOI | |
| Verlag | Washington, DC: ACS Publications |
| Freie Schlagworte | graphene ; carbon nanomembranes ; 2D phase transitions ; nanopores ; electric transport |
| Zusammenfassung | We present a method for a bottom-up synthesis of atomically thin graphene sheets with tunable crystallinity and porosity using aromatic self-assembled monolayers (SAMs) as molecular precursors. To this end, we employ SAMs with pyridine and pyrrole constituents on polycrystalline copper foils and convert them initially into molecular nanosheets - Carbon Nanomembranes (CNMs) - via low-energy electron irradiation induced crosslinking and then into graphene monolayers via pyrolysis. As the nitrogen atoms are leaving the nanosheets during pyrolysis, nanopores are generated in the formed single layer graphene. We elucidate the structural changes upon the crosslinking and pyrolysis down to the atomic scale by complementary spectroscopy and microscopy techniques including X-ray photoelectron (XPS) and Raman spectroscopy, low energy electron diffraction (LEED), atomic force, helium ion and high-resolution transmission electron microscopy (AFM, HIM, HRTEM), and electrical transport measurements. We demonstrate that the crystallinity and porosity of the formed graphene can be adjusted via the choice of molecular precursors and pyrolysis temperature and we present a kinetic growth model quantitatively describing the conversion of molecular CNMs into graphene. The synthesized nanoporous graphene monolayers resemble a percolated network of graphene nanoribbons with a high charge carrier mobility (˜600 cm2/Vs) making them attractive for implementations in electronic field-effect devices. |
| Themenbereich der Metrologie | Elektrizität und Magnetismus |
Zitierung
Neumann, C., Kaiser, D., Mohn, M. J., Füser, M., Weber, N.-E., Reimer, O., Gölzhäuser, A., Weimann, T., Terfort, A., Kaiser, U., & Turchanin, A. A. (2019). Bottom up synthesis of graphene monolayers with tunable crystallinity and porosity. ACS Nano, 13(6), 7310–7322. https://doi.org/10.1021/acsnano.9b03475