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
Article, Bibliographie
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Lukas, Maya ; Meded, Velimir ; Vijayaraghavan, Aravind ; Song, Li ; Ajayan, Pulickel M. ; Fink, Karin ; Wenzel, Wolfgang ; Krupke, Ralph |
| Type of entry: | Bibliographie |
| Title: | Catalytic subsurface etching of nanoscale channels in graphite |
| Language: | English |
| Date: | 22 January 2013 |
| Publisher: | Nature Publishing Group |
| Journal or Publication Title: | Nature Communications |
| Volume of the journal: | 4 |
| DOI: | 10.1038/ncomms2399 |
| 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. |
| Uncontrolled Keywords: | Chemical sciences, Inorganic chemistry, Materials science, Nanotechnology |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 28 Feb 2013 08:57 |
| Last Modified: | 05 Mar 2013 10:06 |
| PPN: | |
| Funders: | 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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