Synthesis and microstructure of metal oxide thin films containing metal nanoparticles by liquid phase deposition (LPD) method |
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| Authors: | S Deki Hnin Yu Yu Ko T Fujita K Akamatsu M Mizuhata A Kajinami |
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| Institution: | (1) Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, JP;(2) Division of Molecular Science, The Graduate School of Science and Technology, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, JP |
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| Abstract: | Au nanoparticles dispersed SiO2-TiO2 composite films have been prepared by a novel wet process, Liquid Phase Deposition (LPD) method. The composite films were
characterized by XRD, XPS, TEM, ICP, SEM and UV-VIS absorption spectroscopy. The results showed that the SiO2-TiO2 composite films containing AuIII and AuI ionic species were co-deposited from a mixed solution of ammonium silicofluoride, ammonium hexafluorotitanate, boric acid
and tetrachloroauric acid. The heat treatment induced the reduction of Au ions and formation of Au nanoparticles in the film.
TEM observation revealed that the Au nanoparticles with 5-10 nm in diameter were found to be dispersed uniformly in the SiO2-TiO2 matrix. The optical absorption band due to the surface plasmon resonance of dispersed Au particles were observed at the wavelength
of 550 nm and shifted toward longer wavelength with increasing heat treatment temperature.
Received 28 November 2000 |
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| Keywords: | PACS 81 16 Be Chemical synthesis methods – 81 20 Ka Chemical synthesis combustion synthesis – 81 07 Bc Nanocrystalline materials – 61 46 +w Nanoscale materials: clusters nanoparticles nanotubes and nanocrystals |
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