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Nanotechnology. 2012 Dec 7;23(48):485602. doi: 10.1088/0957-4484/23/48/485602. Epub 2012 Nov 2.

Fabrication of nanoporous carbon by electrical transformation of amorphous carbon nanospheres.

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  • 1NanoLAB Centre, Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK.


Nanoporous carbon nanospheres <150 nm in diameter have been fabricated for the first time by the transformation of amorphous carbon nanospheres under Joule heating. The process, initiated by current densities of 1.5-8 × 10(10) A m(-2), has been imaged in real time in situ in a transmission electron microscope. Significant atomic diffusion and carbon ordering results in the formation of a 3D network of buckled graphitic sheets bounding interlinked <5 nm diameter pores, with greatly enhanced conductivity. Porous carbon nanospheres offer new opportunities for biocompatible drug delivery, catalysis and energy storage.

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