Copyright (c) 2013 AJC
This work is licensed under a Creative Commons Attribution 4.0 International License.
Time-Resolved Transient Absorption Spectra of Gold Quantum Dot
Corresponding Author(s) : Ling Xu
Asian Journal of Chemistry,
Vol. 25 No. 4 (2013): Vol 25 Issue 4
Abstract
Gold colloid was prepared by reducing aqueous solution of HAuCl4 in certain concentration with NaBH4 and gold particles with average size of 6 nm were used in this study. The time-resolved transient absorption spectra of the gold colloid were obtained by laser flash photolysis technique. The results showed that there was a broad and strong absorption band from 400 to 520 nm and a bleaching band in 520-850 nm. At 472 nm, the lifetime of gold colloid is about 38.6 microseconds (μs) according to the exponent function fitting on the decay curve. At the same time, we can learn from the transient absorption spectra that μs-level gold quantum dot can be produced under 355 nm laser's excitation and it is basically attributed to the positive hole of gold quantum dot.
Keywords
Download Citation
Endnote/Zotero/Mendeley (RIS)BibTeX
- J.D.S. Newman and G.J. Blanchard, Langmuir, 22, 5882 (2006).
- A.M. Venezia, G. Pantaleo, A. Longo, G.D. Carlo, M.P. Casaletto, F.L. Liotta and G. Deganello, J. Phys. Chem. B, 109, 2821 (2005).
- A. Lechtken, D. Schooss, J.R. Stairs, M.N. Blom, F. Furche, N. Morgner, O. Kostko, B.V. Issendorff and M.M. Kappes, Angew. Chem. Int. Ed., 46, 2944 (2007).
- G. Lemière, V. Gandon, N. Agenet, J.P. Goddard, A. de Kozak, C. Aubert, L. Fensterbank and M. Malacria, Angew. Chem. Int. Ed., 45, 7596 (2006).
- N. Marion and S.P. Nolan, Angew. Chem. Int. Ed., 46, 2750 (2007).
- A.M. Gole, C. Sathivel and A. Lachke, J. Chromatogr. A, 848, 485 (1999).
- R.G. DiScipio, Anal. Biochem., 236, 168 (1996).
- J. Xue, W. Li, H. Yu, et al., Photograp. Sci. Phtochem., 24, 262 (2006)
References
J.D.S. Newman and G.J. Blanchard, Langmuir, 22, 5882 (2006).
A.M. Venezia, G. Pantaleo, A. Longo, G.D. Carlo, M.P. Casaletto, F.L. Liotta and G. Deganello, J. Phys. Chem. B, 109, 2821 (2005).
A. Lechtken, D. Schooss, J.R. Stairs, M.N. Blom, F. Furche, N. Morgner, O. Kostko, B.V. Issendorff and M.M. Kappes, Angew. Chem. Int. Ed., 46, 2944 (2007).
G. Lemière, V. Gandon, N. Agenet, J.P. Goddard, A. de Kozak, C. Aubert, L. Fensterbank and M. Malacria, Angew. Chem. Int. Ed., 45, 7596 (2006).
N. Marion and S.P. Nolan, Angew. Chem. Int. Ed., 46, 2750 (2007).
A.M. Gole, C. Sathivel and A. Lachke, J. Chromatogr. A, 848, 485 (1999).
R.G. DiScipio, Anal. Biochem., 236, 168 (1996).
J. Xue, W. Li, H. Yu, et al., Photograp. Sci. Phtochem., 24, 262 (2006)