We thank G. Auner for the use of the Raman microscope. This work was supported by NSF (DMR-0094273 and DMR-0701161) and the Donors of the Petroleum Research Fund, administered by the American Chemical Society. The electron microscopy work was performed on a JEOL 2010 purchased under NSF grant DMR-0216084.
Reversible Gelation of II–VI Nanocrystals: The Nature of Interparticle Bonding and the Origin of Nanocrystal Photochemical Instability†
Article first published online: 9 APR 2010
Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 49, Issue 21, pages 3661–3665, May 10, 2010
How to Cite
Pala, Irina R., Arachchige, Indika U., Georgiev, Daniel G. and Brock, Stephanie L. (2010), Reversible Gelation of II–VI Nanocrystals: The Nature of Interparticle Bonding and the Origin of Nanocrystal Photochemical Instability. Angew. Chem. Int. Ed., 49: 3661–3665. doi: 10.1002/anie.201000034
- Issue published online: 6 MAY 2010
- Article first published online: 9 APR 2010
- Manuscript Received: 5 JAN 2010
- NSF. Grant Numbers: DMR-0094273, DMR-0701161
- American Chemical Society
- raman spectroscopy;
- reaction mechanisms
Programmable assembly and disassembly: Chemical and spectroscopic studies show that SeSe bond formation is responsible for the oxidation-induced aggregation of thiolate-capped CdSe nanocrystals to gels. Treatment with reducing agents leads to SeSe bond cleavage and dispersion of the gel. This process can be cycled, resulting in successively smaller particles (see picture; MUA = 11-mercaptoundecanoic acid, TMAH = tetramethylammonium hydroxide).