This work was supported by NIH 5 R21 CA 133492-02, MARCO-MSD, Intel, NSFC, and the Foundation for the Author of National Excellent Doctoral Dissertation of China.
Separation of Nanoparticles in a Density Gradient: FeCo@C and Gold Nanocrystals†
Article first published online: 23 DEC 2008
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 48, Issue 5, pages 939–942, January 19, 2009
How to Cite
Sun, X., Tabakman, Scott M., Seo, W.-S., Zhang, L., Zhang, G., Sherlock, S., Bai, L. and Dai, H. (2009), Separation of Nanoparticles in a Density Gradient: FeCo@C and Gold Nanocrystals. Angew. Chem. Int. Ed., 48: 939–942. doi: 10.1002/anie.200805047
- Issue published online: 13 JAN 2009
- Article first published online: 23 DEC 2008
- Manuscript Received: 15 OCT 2008
- NIH. Grant Number: 5 R21 CA 133492-02
- Foundation for the Author of National Excellent Doctoral Dissertation of China
- density gradients;
- size distribution
The right sort: A post-synthesis, liquid-phase separation method sorts nanoparticles by centrifugation in a medium with a density gradient. The particles are sorted according to particle size, clustering degree, and core density ρ (see picture; d=sedimentation distance). Solid–solid interactions between colloidal particles and stable phases are thus avoided. This versatile method allows for determination of the colloid size distribution in a suspension.