Lukas, Maya ; Meded, Velimir ; Vijayaraghavan, Aravind ; Song, Li ; Ajayan, Pulickel M. ; Fink, Karin ; Wenzel, Wolfgang ; Krupke, Ralph (2013)
Catalytic subsurface etching of nanoscale channels in graphite.
In: Nature Communications, 4
doi: 10.1038/ncomms2399
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Catalytic hydrogenation of graphite has recently attracted renewed attention as a route for nanopatterning of graphene and to produce graphene nanoribbons. These reports show that metallic nanoparticles etch the surface layers of graphite or graphene anisotropically along the crystallographic zig-zag ‹11–20› or armchair ‹10–10› directions. The etching direction can be influenced by external magnetic fields or the supporting substrate. Here we report the subsurface etching of highly oriented pyrolytic graphite by Ni nanoparticles, to form a network of tunnels, as seen by scanning electron microscopy and scanning tunnelling microscopy. In this new nanoporous form of graphite, the top layers bend inward on top of the tunnels, whereas their local density of states remains fundamentally unchanged. Engineered nanoporous tunnel networks in graphite allow for further chemical modification and may find applications in various fields and in fundamental science research.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Lukas, Maya ; Meded, Velimir ; Vijayaraghavan, Aravind ; Song, Li ; Ajayan, Pulickel M. ; Fink, Karin ; Wenzel, Wolfgang ; Krupke, Ralph |
| Art des Eintrags: | Bibliographie |
| Titel: | Catalytic subsurface etching of nanoscale channels in graphite |
| Sprache: | Englisch |
| Publikationsjahr: | 22 Januar 2013 |
| Verlag: | Nature Publishing Group |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nature Communications |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| DOI: | 10.1038/ncomms2399 |
| Kurzbeschreibung (Abstract): | Catalytic hydrogenation of graphite has recently attracted renewed attention as a route for nanopatterning of graphene and to produce graphene nanoribbons. These reports show that metallic nanoparticles etch the surface layers of graphite or graphene anisotropically along the crystallographic zig-zag ‹11–20› or armchair ‹10–10› directions. The etching direction can be influenced by external magnetic fields or the supporting substrate. Here we report the subsurface etching of highly oriented pyrolytic graphite by Ni nanoparticles, to form a network of tunnels, as seen by scanning electron microscopy and scanning tunnelling microscopy. In this new nanoporous form of graphite, the top layers bend inward on top of the tunnels, whereas their local density of states remains fundamentally unchanged. Engineered nanoporous tunnel networks in graphite allow for further chemical modification and may find applications in various fields and in fundamental science research. |
| Freie Schlagworte: | Chemical sciences, Inorganic chemistry, Materials science, Nanotechnology |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 28 Feb 2013 08:57 |
| Letzte Änderung: | 05 Mär 2013 10:06 |
| PPN: | |
| Sponsoren: | L.S. and P.M.A. acknowledge the support from the office of Naval Research through the MURI program on graphene and the Exotic Nanocarbons, Japan Regional Innovation Strategy Program by Excellence, JST., P.M.A. acknowledges the AvH foundation for the senior Humboldt-Helmholtz award to perform research in Germany., V.M. acknowledges the MMM@HPC EC project for financial support. |
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