Financial support from the Fund for Scientific Research Flanders, Belgium (FWO-Vlaanderen; project nos. G.0129.07 and G.0400.11) is gratefully acknowledged. We thank A. Herman, L. Moens, and S. Dewilde for use of the ultracentrifuge.
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Communication
Separation and Diameter-Sorting of Empty (End-Capped) and Water-Filled (Open) Carbon Nanotubes by Density Gradient Ultracentrifugation†
Article first published online: 22 FEB 2011
DOI: 10.1002/anie.201007324
Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Cambré, S. and Wenseleers, W. (2011), Separation and Diameter-Sorting of Empty (End-Capped) and Water-Filled (Open) Carbon Nanotubes by Density Gradient Ultracentrifugation. Angew. Chem. Int. Ed., 50: 2764–2768. doi: 10.1002/anie.201007324
- †
Publication History
- Issue published online: 8 MAR 2011
- Article first published online: 22 FEB 2011
- Manuscript Received: 22 NOV 2010
Funded by
- Fund for Scientific Research Flanders, Belgium. Grant Numbers: G.0129.07, G.0400.11
Keywords:
- carbon nanotubes;
- chirality;
- luminescence;
- surfactants;
- ultracentrifugation
Sorting by spinning: Empty (end-capped) and water-filled (open) carbon nanotubes, which coexist in aqueous solutions, can be separated by density gradient ultracentrifugation (see picture), and the empty tubes allow enhanced diameter sorting. The isolated empty nanotubes possess narrower electronic and vibrational transitions and enhanced quantum efficiences compared to the water-filled nanotubes.