1613-6829/asset/olbannerleft.gif?v=1&s=abb62bf4c508cccceaedd2e443743ab301acf753)
1613-6829/asset/olbannerright.gif?v=1&s=a0928f6da005e96a3ecfdb9f725fca70c1592474)
Full Paper
Direct Coprecipitation Route to Monodisperse Dual-Functionalized Magnetic Iron Oxide Nanocrystals Without Size Selection
Article first published online: 22 JAN 2008
DOI: 10.1002/smll.200700575
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Li, Z., Tan, B., Allix, M., Cooper, A. I. and Rosseinsky, M. J. (2008), Direct Coprecipitation Route to Monodisperse Dual-Functionalized Magnetic Iron Oxide Nanocrystals Without Size Selection. Small, 4: 231–239. doi: 10.1002/smll.200700575
Publication History
- Issue published online: 4 FEB 2008
- Article first published online: 22 JAN 2008
- Manuscript Received: 23 JUL 2007
Keywords:
- conjugation;
- coprecipitation;
- fluorescence;
- magnetic nanomaterials
Abstract
Water-soluble monodisperse superparamagnetic Fe3O4 nanocrystals decorated with two distinct functional groups are prepared in a single-step procedure by injecting iron precursors into a refluxing aqueous solution of a polymer ligand, trithiol-terminated poly(methacrylic acid) (PMAA-PTTM), bearing both carboxylate and thiol functionalities. The ratio of carboxylic acid groups in the polymer-protecting ligand to the iron precursors plays a key role in determining the particle size and particle size distribution. The surface functionalities of the ligands allow post-synthesis modification of the materials to produce water-soluble fluorescent magnetic nanocrystals.