| 退火对CdS/SiO2介孔组装体系吸收边的影响 |
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| 引用本文： | 杨一军,阚彩侠,毕会娟,张立德. 退火对CdS/SiO2介孔组装体系吸收边的影响[J]. 复合材料学报, 2003, 20(2): 47-52 |
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| 作者姓名： | 杨一军 阚彩侠 毕会娟 张立德 |
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| 作者单位： | 1. 安徽淮北煤炭师范学院,物理系,淮北,235000;中科院,固体物理研究所,安徽,合肥,230031
2. 中科院,固体物理研究所,安徽,合肥,230031 |
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| 基金项目： | 安徽省教育厅自然科学基金，2001kj201ZC， |
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| 摘 要： | 本文作者通过溶胶-凝胶法获得块材CdS纳米颗粒/介孔SiO2组装体系(CdS/SiO2)块体样品,室温下的拉曼谱中观察到CdS的两个特征峰;在氮气和空气气氛中退火处理后,发现吸收边位置随复合量和退火温度不同而移动。经计算,CdS颗粒粒径的理论值与其自由激子半径相当,说明吸收边的移动起因于量子限域效应。
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| 关 键 词： | CdS纳米颗粒 介孔组装体系 吸收边 |
| 文章编号： | 1000-3851(2003)02-0047-06 |
| 收稿时间： | 2002-04-03 |
| 修稿时间： | 2002-04-03 |
ANNEALING EFFECT ON THE ABSORPTION EDGE OF CdS/SiO2 MESOPOROUS ASSEMBLY |
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| YANG Yijun,KAN Caixia,BI Huijuan,ZHANG Lide. ANNEALING EFFECT ON THE ABSORPTION EDGE OF CdS/SiO2 MESOPOROUS ASSEMBLY[J]. Acta Materiae Compositae Sinica, 2003, 20(2): 47-52 |
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| Authors: | YANG Yijun KAN Caixia BI Huijuan ZHANG Lide |
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| Affiliation: | 1. Department of Physics, Huaibei Coal Teacher's College, Huaibei 235000,China;2. Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031,China |
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| Abstract: | Monolithic mesoporous CdS/SiO2 assembly systems were obtained by sol-gel technique. The characteristic peaks of CdS in Raman spectrum were observed at room temperature. The as-prepared samples were annealed under air and nitrogen, respectively. It is observed that the absorption edge of the CdS/SiO2 shifts in comparison with that of the bulk CdS as the annealing temperature change as well as the loading of CdS in SiO2. The calculating result showed that the size of CdS particles in the mesoporous SiO2 is similar to its exciton radius on quantity. The shift of the absorption edge was attributed to the quantum size effect. |
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| Keywords: | CdS nanoparticles mesoporous assembly absorption edge |
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