期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 85, 期 3, 页码 374-380出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2005.06.025
关键词
gold nanoparticle; MCM-41; UV-Vis spectroscopy
We report a possible application of Ultra violet-visible (UV-Vis) spectroscopy technique to study a time evolution of a gold colloidal system in restricted geometry. We used a unique property of temperature and size dependence of the gold surface plasmon band. The absorption spectra show the slow and faster-nucleation of the gold atoms in the solution of HAuCl4, sodium citrate and MCM-41. The interfacial undercooling was estimated by comparing the absorption spectra of the bulk solution to the pore solution. Our result is consistent with a Gibbs-Thomson constant K = 54 +/- 2 degrees C nm, which is in good agreement with the values given by the previous experiments [R. Schmidt, E.W. Hansen, M.D. Akporiaye, O.H. Stocker, Ellestad, J. Am. Chem. Soc. 117 (1995) 4049, A. Schreiber, I. Ketelsen, G.H. Findenegg, Phys. Chem. Chem. Phys. 3 (2001) 1185]. (c) 2005 Elsevier Inc. All rights reserved.
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