Browsing by Author "Huang, Kuo-Yen"

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Dynamic study on the transformation process of gold nanoclusters
(2014-11-07)
Ma, Xiaoqian
;
Wen, Xiaoming
;
Toh, Yon-Rui
;
Huang, Kuo-Yen
;
Tang, Jau
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.