Simple method to prepare size-controllable gold nanoparticles in solutions and their applications on surface-enhanced Raman scattering
Article first published online: 28 SEP 2010
Copyright © 2010 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 42, Issue 4, pages 621–625, April 2011
How to Cite
Yu, C.-C., Liu, Y.-C., Yang, K.-H. and Tsai, H.-Y. (2011), Simple method to prepare size-controllable gold nanoparticles in solutions and their applications on surface-enhanced Raman scattering. J. Raman Spectrosc., 42: 621–625. doi: 10.1002/jrs.2764
- Issue published online: 19 APR 2011
- Article first published online: 28 SEP 2010
- Manuscript Accepted: 22 JUN 2010
- Manuscript Received: 19 DEC 2009
- National Science Council of the Republic of China. Grant Number: NSC-97-2622-E-238-008-CC3
- surface-enhanced Raman scattering;
- gold nanoparticles;
- size-controllable preparation;
We report here, for the first time, a simple method to prepare size-controllable Au nanoparticles (NPs) in aqueous solutions from bulk Au substrates. First, chitosan (Ch)-capped Au-containing complexes were prepared by electrochemical oxidation–reduction cycles in 0.1 N NaCl and 1 g/l Ch solutions. Then the solutions were heated from room temperature to boiling at different heating rates to synthesize size-controllable Au NPs. The particle sizes of the prepared Au(111) NPs could be controlled from 5 to 30 nm with an increase of the heating rate during preparation. Experimental results indicate that the prepared Au(111) NPs with diameters ranging from 10 to 30 nm can serve as surface-enhanced Raman scattering active probes for molecules of rhodamine 6G. Copyright © 2010 John Wiley & Sons, Ltd.