| 金纳米粒子的非线性共振散射及光强度函数研究 |
| A Study of the Nonlinear Scattering for Au Nanoparticles in Liquid and its Light Intensity Function |
|
| 摘要: 液相金纳米粒子在320nm、470nm、580nm、720nm处产生四个共振散射峰。它是一种非线性光学介质,当入射光的频率v不同时可获得金纳米粒子的2v倍频、v/2分频、v/3分频、2v/3分频、3v/2分频散射峰。探讨了影响液相金纳米粒子散射光信号强度I(λ)的主要因素即散射光能量分布、粒径d、 λ(λem-λex)和散射光辐射度Rλ。给出了共振散射光强度与 λ之间的高斯分布函数。建立了一个合理的金纳米粒子的共振散射光强度函数。 |
| 关键词: 全纳米粒子 共振散射 非线性 散射光强度函数 |
| 基金项目: 广西自然科学基金资助项目 |
| Abstract: The An nanoparticles in liquid were prepared by means of microwave procedure.The diameter was determined by transmission electron microscope.There are four resonance scattering peaks at 320nm, 470nm, 580nm and 720nm respectively.It is a nonlinear scattering medium.A 1/2 fraction frequency scattering peak at 580nm(1/2 ×1.03 ×1015Hｚ) and a 1/3 fraction frequency scattering peak at 870nm(1/3 ×1.03 ×1015H.) were obtained as the excitation wavelength is at 290nm (1.03 ×1015Hz).When the excitation wavelength is at 580nm(5.02 × 1014Hz), It exhibits a double frequency scattering peak at 290nm(2 ×5.02 × 1014Hｚ) and a 2/3 fraction frequency scattering peak at 870nm(2/3 × 5.02× 1014Hｚ).When the excitation wavelength is at 870urn(3.34× 1014Hz), a three-times frequency scattering peak at 290nm(3 × 3.34 × 1014Hz) and a 3/2 fraction frequency scattering peak at 580nm(3/2 × 3.34× 1014Hz) were observed.The influence of the scattering light intensity distribution, diameter, λ(λex - λem) and the spectral radiance of scattering Rλm emitted by the cluster on scattering signal I(λ) has been considered.The Gauss function between the intensity and λ were obtained.Areasonable scattering light intensity function for Au nanoparticles in liquid has been proposed. |
| Keywords: Au nanoparticles resonance scattering nonlinear scattering intensity function |
| 投稿时间：2000-10-27 修订日期：2001-01-03 |
| 摘要点击次数: 1702 |
| 全文下载次数: 1666 |
| 蒋治良,冯志伟,刘庆业,蒋毅民,梁宏.金纳米粒子的非线性共振散射及光强度函数研究[J].无机化学学报,2001,17(3):355-360. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
