| 化学腐蚀法制备发光硅纳米颗粒 |
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| 引用本文： | 吴悦迪,朱骏,刘红飞,陈海涛,陈小兵.化学腐蚀法制备发光硅纳米颗粒[J].扬州大学学报(自然科学版),2011,14(2). |
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| 作者姓名： | 吴悦迪 朱骏 刘红飞 陈海涛 陈小兵 |
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| 作者单位： | 扬州大学物理科学与技术学院,江苏扬州,225002 |
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| 基金项目： | 国家自然科学基金资助项目(11004170); 扬州大学“新世纪人才工程”资助项目 |
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| 摘 要： | 用硝酸和氢氟酸的混合酸液腐蚀普通硅粉,经过超声空化作用,分别在去离子水、无水乙醇中制备出硅纳米晶颗粒.硅纳米颗粒的平均粒径约为2 nm,它们或单独存在,或包裹于非晶态物质中.在320 nm的光激发下,硅纳米颗粒的悬浮液在390 nm处呈现一明显的紫外发光峰,理论分析证明该发光峰与硅量子点的量子限制效应有关.
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| 关 键 词： | 硅纳米晶 化学腐蚀 光致发光 量子限制效应 |
Luminescent Si nanocrystals synthesized by chemical etching |
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| WU Yue-di,ZHU Jun,LIU Hong-fei,CHEN Hai-tao,CHEN Xiao-bing.Luminescent Si nanocrystals synthesized by chemical etching[J].Journal of Yangzhou University(Natural Science Edition),2011,14(2). |
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| Authors: | WU Yue-di ZHU Jun LIU Hong-fei CHEN Hai-tao CHEN Xiao-bing |
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| Institution: | WU Yue-di,ZHU Jun,LIU Hong-fei,CHEN Hai-tao,CHEN Xiao-bing(Sch of Phys Sci &Tech,Yangzhou Univ,Yangzhou 225002,China) |
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| Abstract: | In this paper the silicon nanocrystals are systhesised in de-ionized water or ethanol via chemical etching of silicon powders in a mixture solution of HNO3 and HF followed by the ultrasonic vibration.The silicon nanocrystals have a size of about 2 nm,which are suspended in the solutions or surrounded in the amorphous shell.The de-ionized water suspension of Si nanocrystals shows a photoluminescence band at 390 nm in the ultraviolet band as the excitation wavelength is 320nm.The strong photoluminescence is r... |
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| Keywords: | silicon nanocrystals chemical etching photoluminescence quantum confinement |
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