A Magneto‐catalytic Writing Technique for Etching Complex Channel Patterns into Graphenic Carbons

Bulut, Lutfiye; Hurt, Robert H.

doi:10.1002/adma.200901932

Cited by 12 publications

(14 citation statements)

References 54 publications

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“…Apart from porous material with various tunnel sizes and direction, the pore size could be adjusted to requirements by the use of monodisperse metal particles and even the direction of the channels can be steered by use of magnetic particles 11 . The tunnel walls consist of well-defined hydrogenated sites, which by further chemical substitution, could be functionalized as substancespecific docking sites.…”

Section: Discussionmentioning

confidence: 99%

“…Nanoparticles consisting of various metals, such as Ni 2,8,9,10 , Fe 2,7 , Pt 3 , Co 2,4,5 and Ag 6 , are known to etch channels on graphite surfaces. It was shown that the etching direction could be influenced by an external magnetic field when Co particles were used 11 . Similarly, the etching direction on mono and few-layer graphene could be controlled by the structure of the substrate [12][13] .…”

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confidence: 99%

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Catalytic subsurface etching of nanoscale channels in graphite

et al. 2013

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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 /11-20S or armchair /10-10S 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.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Catalytic subsurface etching of nanoscale channels in graphite

et al. 2013

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“…Linear trenches of several micrometers are tus produced as the active nanoparticles travel along graphene crystallographic direction during the oxidation reaction. [235][236][237] If one controls the nanoparticle size and trajectory [238] as well as the oxidation reaction rate, one can anticipate that large scale cutting of graphite with extremely high resolution will be achieved.…”

Section: Conclusion: Graphene In the Post-silicon And Post-cmos Erasmentioning

confidence: 99%

Production, properties and potential of graphene

Soldano

Mahmood

Dujardin

2010

Carbon

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This review on graphene, a one atom thick, two-dimensional sheet of carbon atoms, starts with a general description of the graphene electronic structure as well as a basic experimental toolkit for identifying and handling this material. Owing to the versatility of graphene properties and projected applications, several production techniques are summarized, ranging from the mechanical exfoliation of high quality graphene to the direct growth on carbides or metal substrates and from the chemical routes using graphene oxide to the newly developed approach at the molecular level. The most promising and appealing properties of graphene are summarized from an exponentially growing literature, with a particular attention to matching production methods to characteristics and to applications. In particular, we report on the high carrier mobility value in suspended and annealed samples for electronic devices, on the thickness-dependent optical transparency and, in the mechanical section, on the high robustness and full integration of graphene in sensing device applications. Finally, we emphasize on the high potential of graphene not only as a post-silicon materials for CMOS device application but more ambitiously as a platform for post-CMOS molecular architecture in electronic information processing.Comment: Review article: 21 pages, 243 references, 10 figures. Accepted for publication in Carbon, 201

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“…So the Tammann temperature creates physical conditions for the catalytic activity: it opens the route to efficient flux of carbon atoms by bulk diffusion through the catalyst [34]. It is interesting that, in a recent study, a magnetic attraction was found to help in promoting the contact of Co and graphite and even allowed the control of the direction of channeling [35]. Schaffel et al studied recently carbon gasification catalyzed by Ni and Co, based in in-situ microscopy observations [36,37].…”

Section: Tammann Temperature and Particle/carbon Active Contactmentioning

confidence: 96%