| 金纳米粒子组装体系粒子密度与SERS强度的关系 |
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| 引用本文： | 朱梓华,朱涛,王健,刘忠范.金纳米粒子组装体系粒子密度与SERS强度的关系[J].物理化学学报,2000,16(2):138-144. |
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| 作者姓名： | 朱梓华 朱涛 王健 刘忠范 |
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| 作者单位： | Center for Nanoscale Science and Technology(CNST),College of Chemistry Molecular Engineering,Peking University,Beijing 100871 |
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| 基金项目： | 国家自然科学基金资助项目（编号29803002） |
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| 摘 要： | 利用纳米粒子组装技术制备出金基底／巯基苯胺自组装膜偶联层／金纳米粒子的“三明治”结构。实验结果显示，该结构对偶联层分子的喇曼光谱显示出很好的增强效应，增强因子可达１０＾５；在表面粒子密度（粒子覆盖度）较低时，表面增强喇曼散射（ＳＥＲＳ）强度与表面粒子密度近似呈线性关系；随着表面粒子密度的增加，这种线性关系出现负偏差并在表面粒子密度较高区域出现一个平台；在６０￣１１０ｎｍ范围内大粒径金粒子对喇曼光谱
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| 关 键 词： | 金纳米粒子 纳米粒子组装 表面增强喇曼光谱 粒子密度 |
| 收稿时间： | 1999-04-08 |
| 修稿时间： | 1999-08-17 |
Dependence of the Raman Intensity on the Surface Coverage of Nanoparticles in SERS-active Gold Nanoparticulate Films |
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| Zhu Zihua,Zhu Tao,Wang Jian,LIU Zhongfan.Dependence of the Raman Intensity on the Surface Coverage of Nanoparticles in SERS-active Gold Nanoparticulate Films[J].Acta Physico-Chimica Sinica,2000,16(2):138-144. |
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| Authors: | Zhu Zihua Zhu Tao Wang Jian LIU Zhongfan |
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| Institution: | Center for Nanoscale Science and Technology(CNST),College of Chemistry Molecular Engineering,Peking University,Beijing 100871 |
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| Abstract: | The relationship between the surface coverage of nanoparticles and the intensity of surface enhanced Raman scattering(SERS) in a two dimensional gold nanoparticulate film was studied. High enhancement was observed due to the nanoparticle substrate electromagnetic coupling and the contribution of chemical enhancement. It was found that SERS intensity increased linearly at lower coverage, then negatively deflected from the initial line, and finally reached a plateau at increased coverages. It was also found that larger nanoparticles were more effective in Raman enhancement. |
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| Keywords: | Au nanoparticles Nanoparticle assembly SERS Surface coverage |
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