Formation of quantum-size PbTe microcrystals in sol-gel derived silica and borosilicate glasses |
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Authors: | Guangming Li Masayuki Nogami |
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Affiliation: | (1) Department of Applied Chemistry, Aichi Institute of Technology, 470-03 Toyota, Japan |
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Abstract: | PbTe-doped silica and borosilicate glasses with the particle size ranging from 2 to 15 nm were prepared by the sol-gel method. Under a reducing H2 gas atmosphere, PbTe microcrystalline phase was produced at a temperature of about 400°C via the initial Te crystalline phase formed at a low temperature, around 300°C. In borosilicate glasses, PbTe microcrystals were found to have a higher growth rate than in silica glasses. The absorption edge was shifted from the infrared to near visible range with a decrease in particle size due to the quantum-size confinement effect. |
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Keywords: | PbTe microcrystal sol-gel process optical absorption quantum-size confinement borosilicate glass |
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