True Strange Library

The curious collection of a slightly mad scientist

Light-emitting nanotubes get brighter with zero-dimensional states

Carbon nanotubes have the potential to function as light-emitting devices, which could lead to a variety of nanophotonics applications. However, nanotubes currently have a low luminescence quantum yield, typically around 1%, which is restricted by their one-dimensional nature. In a new study, scientists have demonstrated that artificially modifying the dimensionality of carbon nanotubes by doping them with zero-dimensional states can increase their luminosity to 18%. The findings could lead to the development of nanophotonics devices such as a near-infrared single-photon emitter that operates at room temperature.

The researchers, Yuhei Miyauchi, et al., have published their paper on modifying the dimensionality of carbon nanotubes in a recent issue of Nature Photonics.

Under an applied electric current or light irradiation, excited electrons and holes (positively charged locations where electrons are missing) are created, and carbon nanotubes emit near-infrared light. In this process, excited electrons and holes form bound states called excitons, and a photon is emitted due to the recombination of an electron and a hole during this process. …

http://phys.org/news/2013-07-light-emitting-nanotubes-brighter-zero-dimensional-states.html

Sorry, I can’t hear you. I’m in a zero dimensional state.

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This entry was posted on July 23, 2013 by in Uncategorized.
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