Carbon based nanostructures

Towards carbon-based nanotechnology

Manfred KappesOur work described in the 14th December 2006 issue of Nanotechnology was based on recent activities in the field of fullerene-based nanostructures. In particular, we had previously implemented a focused-ion beam structuring method to pin soft-landed carbon clusters at intentionally created defect sites on highly oriented pyrolitic graphite surfaces.

In the present work, we have developed a method to fabricate arrays of hexagonal nanometre-sized cavities on HOPG surfaces based on such defect sites. The method exploits the fact that the amorphous carbon generated by ion beam implantation is considerably more reactive than the graphite basal plane.

Manfred Kappes

In the first step (writing) the sp2-hybridized surface becomes locally amorphized by exposing it to a focused beam of fast Ga+ ions. Subsequently, the arrays of amorphous carbon areas are etched by molecular oxygen at pressures of up to 200 mbar – at elevated surface temperatures. All geometrical parameters of the resulting nanocavity arrays are fully controllable within a wide length range.

In future, we intend to use these arrays of nanocavities as periodically arranged nanoreactors. Furthermore, the nanomesa arrays appearing upon cavity-cavity coalescence at long etch times are promising sources of monodisperse nanographene sheets.

Artur Böttcher

About the author

Artur Böttcher studied experimental physics at the Nicolaus Copernicus University in Torun. He has worked on various aspects of modern surface science at the Fritz Haber Institute and the Humboldt University in Berlin. He is currently involved in a research program for fabrication of functional nanostructures at the University of Karlsruhe, Germany. His activities are focused on the fabrication of nanostructures comprising of mass-selected carbon clusters. Manfred M. Kappes is professor of physical chemistry at the University of Karlsruhe and has a joint appointment with the Institute of Nanotechnology at the Karlsruhe Research Center (both institutions are soon to be fused into the Karlsruhe Institute of Technology). His research interests include the novel properties of matter at the nanometer scale.

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VDM Verlag Quantum Transport in Carbon-based Nanostructures: Theory and Computational Methods
Book (VDM Verlag)

Paper battery?

by edsdesk

Mon Dec 7, 4:28 pm ET
WASHINGTON (Reuters) – Ordinary paper could one day be used as a lightweight battery to power the devices that are now enabling the printed word to be eclipsed by e-mail, e-books and online news.
Scientists at Stanford University in California reported on Monday they have successfully turned paper coated with ink made of silver and carbon nanomaterials into a "paper battery" that holds promise for new types of lightweight, high-performance energy storage.
The same feature that helps ink adhere to paper allows it to hold onto the single-walled carbon nanotubes and silver nanowire films

Some ... some not.

by setArcos

Biotechnology, bioinformatics
Emerging technology
Genetic engineering
Synthetic biology, synthetic genomics
Artificial photosynthesis
Anti-aging drugs: resveratrol, SRT1720
Vitrification or cryoprotectant
Hibernation or suspended animation
Stem cell treatments
Personalized medicine
Body implants, prosthesis
In vitro meat
Regenerative medicine
[edit] Energy systems
Emerging technology
Concentrated solar power includes thermal

Nanotubes Increase Solar PV Conductivity 100 Million-Fold  — Sourceable
Carbon-based nanostructures are already being used as materials in solar cells with increasing frequency, yet their ability to enhance electrical performance has thus far been hampered by limited ability to assemble orderly networks using the materials.

LAP LAMBERT Academic Publishing Optoelectronic properties of carbon-based nanostructures: Steering electrons in graphene by electromagnetic fields
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ProQuest, UMI Dissertation Publishing Electron transport properties of carbon-based nanostructures.
Book (ProQuest, UMI Dissertation Publishing)
Wiley-ISTE Carbon Nanotubes and Nanosensors: Vibration, Buckling and Balistic Impact (ISTE)
eBooks (Wiley-ISTE)
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