| 介电限域效应对SnO_2纳米微粒光学特性的影响 |
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| 引用本文： | 余保龙,吴晓春,邹炳锁,张桂兰,汤国庆,陈文驹.介电限域效应对SnO_2纳米微粒光学特性的影响[J].物理化学学报,1994(2). |
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| 作者姓名： | 余保龙 吴晓春 邹炳锁 张桂兰 汤国庆 陈文驹 |
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| 作者单位： | 南开大学现代光学研究所!天津300071 |
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| 摘 要： | 半导体纳米微粒作为一种新兴材料，在声、光、电、磁、热及催化等方面显示出全新的异于体相材料和分子或原子的特性，在理论和实验上已引起。们极大的兴趣I‘，’］．当纳米微粒的尺寸接近或小于激于玻尔半径时，表现出明显的量子尺寸效应，其表现光学能隙变大，一些半导体粒子如CdS，Cdse等纳米微粒的量予尺寸效应已经被人们利用有效质量近似模型做了定性解释。八但是，由于纳米微粒尺寸小，具有相对大的表面积，因而粒子周围的介质可以强烈地影响它们的光学性质【’，‘1．我们采用胶体化学方法，对SnO。阶电常数为13）半导体纳米微粒…
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| 关 键 词： | 介电限域效应 SnO_2纳米微粒 表面修饰 |
The Effects of Dielectric Confinement Effects on the Optica Properties of SnO_2 Nanometer Particles |
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| Yu Baolong, Wu Xiaochun,Zou Bingsuo, Zhang Guilan, Tang Guoqing, Chen Wenju.The Effects of Dielectric Confinement Effects on the Optica Properties of SnO_2 Nanometer Particles[J].Acta Physico-Chimica Sinica,1994(2). |
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| Authors: | Yu Baolong Wu Xiaochun Zou Bingsuo Zhang Guilan Tang Guoqing Chen Wenju |
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| Abstract: | It is found that the SnO2 nanometer particle modified by chemical methods on its surface with a layer of steric acid molecules has a significant red shift of optical absorption band edge and clear photoluminescence at room temperature, which is in contrast with that of bulk SnO2 and naked SnO2 nanometer particles. It is concluded that these results are related to the dielectric confinement effects on the SnO2 nanometer particles surfaces. |
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| Keywords: | Dielectric confinement effect SnO_2 nanometer particle Surface modification |
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