| 2q锗纳米材料制备中产量与水层的关系研究 |
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| 引用本文： | 蒋毅.2q锗纳米材料制备中产量与水层的关系研究[J].嘉应学院学报,2012,30(8):24-28. |
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| 作者姓名： | 蒋毅 |
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| 作者单位： | 嘉应学院物理与光信息科技学院,广东梅州,514015 |
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| 摘 要： | 研究激光烧蚀水面下的块体锗靶.研究结果表明,激光烧蚀锗的产量(烧蚀率)随锗基板表面水层厚度变化而变化.对单个激光脉冲为60 mJ能量时,烧蚀出的锗溶液浓度在水层为1.2 mm时最高.它揭示在水约束条件下存在一个最优水层厚度,诱导出的等离子体具有最强的冲击力,这种高压、高温等离子体导致最高的烧蚀率.对各水层厚度下烧蚀的锗颗粒粒径做了分析,得到锗纳米粒径随水层厚度增加而单调减少.XRD表明立方单晶锗经激光烧蚀后成为面心立方多晶锗,且含有亚稳相GeO.
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| 关 键 词： | 激光 烧蚀 锗纳米 最优水层 |
Output Production VS Thickness of Water Layer in Manufacturing Germanium Nanomaterials |
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| JIANG Yi.Output Production VS Thickness of Water Layer in Manufacturing Germanium Nanomaterials[J].Journal of Jiaying University,2012,30(8):24-28. |
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| Authors: | JIANG Yi |
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| Institution: | JIANG Yi(School of Physics and Optical Information Technology,Jiaying University,Meizhou 514015,China) |
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| Abstract: | Laser ablation of Ge under a water surface has been investigated.It is found that the laser ablation production(ablation rate) of Ge varies with the thickness of the water layer above the Ge substrates.The solution concentration of Ge is the most highly enhanced with a water layer of 1.2 mm at a laser fluence of 60mJ.It is revealed that the plasma generated in the water confinement regime with an optimal water layer thickness induces the strongest pressure.This high-pressure,high-temperature plasma results in the highest ablation production.Particlesize of laser ablation of Ge are analyzed in each layer thickness.It is found that particle size of Ge is reduce when the water layer thickness is increase.XRD shows single crystalline cubic Ge became crystalline planes of the cubicGe and with metastability phase GeO after laser ablation. |
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| Keywords: | laser ablation germanium nano optimal water layer |
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