| 金/银合金纳米颗粒的制备及光学吸收特性 |
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| 引用本文： | 闫仕农,王永昌,魏天杰,郝丽梅,黄丽清.金/银合金纳米颗粒的制备及光学吸收特性[J].功能材料与器件学报,2005,11(3):269-272. |
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| 作者姓名： | 闫仕农 王永昌 魏天杰 郝丽梅 黄丽清 |
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| 作者单位： | 西安交通大学理学院现代物理研究所,西安,710049;中北大学理学系,太原,030051;西安交通大学理学院现代物理研究所,西安,710049;中北大学理学系,太原,030051 |
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| 基金项目： | 国家自然科学基金资助项目（No.60277003） |
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| 摘 要： | 以柠檬酸盐为还原剂，通过共还原氯金酸和硝酸银的混合溶液制备出Au／Ag合金纳米颗粒，用透射电子显微镜（TEM）对颗粒的形貌和尺寸进行了表征。300-800nm范围的吸收光谱研究发现，Au／Ag合金纳米颗粒具有单峰等离子体吸收特征，且随着反应液中氯化金和硝酸银的摩尔比的减少，吸收峰将产生蓝移。实验结果表明，Au-Ag合金纳米颗粒的光学吸收特性具有组分可裁剪性，使其在纳米尺度的光学领域具有潜在的应用价值。
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| 关 键 词： | Au-Ag合金纳米颗粒 光学吸收特性 蓝移 |
| 文章编号： | 1007-4252（2005）03-0269-04 |
| 收稿时间： | 2004-09-27 |
| 修稿时间： | 2004-11-23 |
Synthesis and optical absorption properties of Au-Ag alloy nanoparticles |
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| YAN Shi-nong,WANG Yong-chang,WEI Tian-jie,HAO Li-mei,HUANG LI-qing.Synthesis and optical absorption properties of Au-Ag alloy nanoparticles[J].Journal of Functional Materials and Devices,2005,11(3):269-272. |
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| Authors: | YAN Shi-nong WANG Yong-chang WEI Tian-jie HAO Li-mei HUANG LI-qing |
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| Abstract: | Gold-silver alloy nanoparticles were synthesized in aqueous solution by the co-reduction of chlorauric acid HAuCl4 and silver nitrate AgNO3 using sodium citrate as reducing agent. TEM was em- ployed to analyse the morphology and size of the alloy nanoparticles. The optical-absorption spectra in the range of 300-800nm show the characteristic of single plasmon resonance absorption band,and the absarption band shows blue-shift with decreasing the molar ratio of HAuCl4 to AgNO3 in the reacting solution. The experimental results show that the gold-silver alloy nanoparticles possess composition-dependent tunability of their optical property which makes them have potential applications in the field of nano-optics. |
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| Keywords: | Au-Ag alloy nanoparticles optical absorption property blue-shift |
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