Emission characteristics of diameter controlled SnO2 nanowires |
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| Authors: | SY Lee Yongmin Kim Sangdan Kim |
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| Institution: | a Department of Applied Physics and Institute of Nanosensors and Biotechnology, Dankook University, Yongin 448-701, Republic of Korea
b Department of Physics, Kyonggi University, Suwon 443-760, Republic of Korea |
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| Abstract: | SnO2 nanowires with controlled diameters were grown by chemical vapor deposition process for which four different diameters ranging from 50 to 140 nm were grown by the controlling thickness of gold-thin-films as catalysts. The influence of the diameter-to-thickness ratio as well as the mechanism of its formation was studied. The relationship between photoluminescence intensities and aspect ratio with considering surface effects of SnO2 nanowires was also investigated. The room temperature luminescence intensity was diminished with decreasing the diameter of nanowires due to the increasing surface/volume ratio. The transition energy and emission intensity show abnormal behavior as temperature decreased from room temperature to 5 K. |
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| Keywords: | SnO2 Nanowires Diameter Surface/volume ratio Luminescence |
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