Direct Synthesis of Water-Soluble Ultrathin CdS Nanorods and Reversible Tuning of the Solubility by Alkalinity
- 26 January 2010
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 132 (6), 1819-1821
- https://doi.org/10.1021/ja909776g
Abstract
Highly water-soluble ultrathin and fluorescent CdS nanorods are directly synthesized with the assistance of PEI. PEI plays as the passivator to control and induce the growth of the CdS nanorods and also makes the as-obtained nanorods dispersible in water. The as-obtained CdS nanorods are quite thin thus showing the quantum effect in the fluorescence. By adjusting the alkalinity of the solution, CdS nanorods can be controlled to precipitate or redisperse in water, which is believed to stem from the variation of the charges of the capping PEI molecules. These results provide an efficient and convenient way to directly synthesize water-soluble and fluorescent nanocrystals, which has potential application in biological labeling and detection.Keywords
This publication has 42 references indexed in Scilit:
- Quantum Dot−Aptamer Conjugates for Synchronous Cancer Imaging, Therapy, and Sensing of Drug Delivery Based on Bi-Fluorescence Resonance Energy TransferNano Letters, 2007
- Synthesis of Monodisperse Spherical NanocrystalsAngewandte Chemie-International Edition, 2007
- Shape Control of Semiconductor and Metal Oxide Nanocrystals through Nonhydrolytic Colloidal RoutesAngewandte Chemie-International Edition, 2006
- Chemistry and Properties of Nanocrystals of Different ShapesChemical Reviews, 2005
- Colloidal nanocrystal synthesis and the organic–inorganic interfaceNature, 2004
- Hydrophobic Nanocrystals Coated with an Amphiphilic Polymer Shell: A General Route to Water Soluble NanocrystalsNano Letters, 2004
- Water-Soluble Quantum Dots for Multiphoton Fluorescence Imaging in VivoScience, 2003
- Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic DetectionScience, 1998
- Semiconductor Clusters, Nanocrystals, and Quantum DotsScience, 1996
- Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallitesJournal of the American Chemical Society, 1993