標題: | Dynamic study on the transformation process of gold nanoclusters |
作者: | Ma, Xiaoqian Wen, Xiaoming Toh, Yon-Rui Huang, Kuo-Yen Tang, Jau Yu, Pyng 光電工程學系 Department of Photonics |
關鍵字: | gold nanocluster;time-dependent fluorescence spectra;structure transformation;growth mechanism |
公開日期: | 7-十一月-2014 |
摘要: | In this paper, the transformation process from Au-8 to Au-25 nanoclusters (NCs) is investigated with steady state fluorescence spectroscopy and time-resolved fluorescence spectroscopy at various reaction temperatures and solvent diffusivities. Results demonstrate that Au-8 NCs, protected by bovine serum albumin, transform into Au-25 NCs under controlled pH values through an endothermic reaction with the activation energy of 74 kJ mol(-1). Meanwhile, the characteristic s-shaped curves describing the formation of Au-25 NCs suggest this process involves a diffusion controlled growth mechanism. |
URI: | http://dx.doi.org/10.1088/0957-4484/25/44/445705 http://hdl.handle.net/11536/123912 |
ISSN: | 0957-4484 |
DOI: | 10.1088/0957-4484/25/44/445705 |
期刊: | NANOTECHNOLOGY |
Volume: | 25 |
Issue: | 44 |
顯示於類別: | 期刊論文 |