| Au和SiO2多壳结构的制备和表征 |
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| 引用本文： | 王毅,谈勇,丁少华,李鹂,钱卫平.Au和SiO2多壳结构的制备和表征[J].化学学报,2006,64(22):2291-2295. |
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| 作者姓名： | 王毅 谈勇 丁少华 李鹂 钱卫平 |
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| 作者单位： | 东南大学生物科学与医学工程系生物电子学国家重点实验室 南京210096 |
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| 基金项目： | 国家自然科学基金(Nos.30370312,90406024-4)，江苏省自然科学基金(No.BK2005067)，高等学校全国优秀博士学位论文作者专项资金(No.200252)资助项目. |
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| 摘 要： | 利用自组装技术和胶体还原化学, 制备出金纳米壳Au@SiO2以及SiO2包裹的金纳米壳SiO2@Au@SiO2; 去除SiO2@Au@SiO2颗粒中的金壳层, 获得含有可移动SiO2核的空心壳H-SiO2@M-SiO2. 结果显示: SiO2@Au@SiO2复合颗粒表面光滑, 并保留了金壳的近红外吸收特性; 通过改变复合颗粒外层SiO2厚度, 可以调节其等离激元共振峰的位置; 王水可以有效地去除SiO2@Au@SiO2中的金壳, 相应的等离激元共振峰消失.
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| 关 键 词： | 核-壳结构 金纳米壳 SiO2包裹金纳米壳 等离激元共振 折射率 |
| 收稿时间： | 03 8 2006 12:00AM |
| 修稿时间： | 2006-03-082006-07-29 |
Fabrication and Characterization of Multishell Structures Based on Au and SiO2 |
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| WANG Yi,TAN Yong,DING Shao-Hua,LI Li,QIAN Wei-Ping.Fabrication and Characterization of Multishell Structures Based on Au and SiO2[J].Acta Chimica Sinica,2006,64(22):2291-2295. |
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| Authors: | WANG Yi TAN Yong DING Shao-Hua LI Li QIAN Wei-Ping |
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| Institution: | State Key Laboratory of Bioelectronics, Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096 |
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| Abstract: | Gold nanoshells (Au@SiO2) and silica-covered gold nanoshells (SiO2@Au@SiO2) were fabri- cated by self-assembly and colloid reduction chemistry. Hollow silica shells with movable silica spheres (H-SiO2@M-SiO2) were also prepared by the dissolution of gold shells within SiO2@Au@SiO2 particles. The results show that silica-covered gold nanoshells preserve the near-infrared absorbance of gold nanoshells. The plasmon resonance peaks of the resulting SiO2@Au@SiO2 could be controlled by changing the thickness of the outer silica shells. Furthermore, the gold shells within SiO2@Au@SiO2 particles could be removed by using aqua regia, and the related plasmon resonance peaks disappeared. |
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| Keywords: | core-shell structure gold nanoshell silica-covered gold nanoshell plasmon resonance refrac- tive index |
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