SPT方法在纳米粒子布朗运动观测中的应用
Brownian motion measurement of nano particles with the SPT method
查看参考文献11篇
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文摘
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纳米粒子布朗运动特性对Micro-/Nano-PIV的使用和与粒子相关的物理现象的研究有重要意义.观测了200nm荧光粒子的布朗运动,利用单粒子追踪(SPT)算法和自编程序处理图像,获得粒子的均方位移,计算了实验扩散系数D_(exp)为2.09×10~(-12) m~2/s.与Stokes-Einstein公式估计的理论扩散系数D_(th)相比,二者量阶一致,但实验扩散系数的数值偏小约5%.对相关的实验误差进行了分析. |
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其他语种文摘
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The Brownian motion of nano tracer has important effects on the measurement accuracy of Micro-/Nano-PIV and evaluating many other parameters of the liquids.In this paper,the author tracked the trajectories of 200nm particles.Using the single particle tracking(SPT) algorithm,an in-house image processing programe was compiled,with which the image series were processed.The experiment got a diffusion coefficent D_(exp) of about 2.09×10~(-12) m~2/s.Compared with the theoretical value D_(th) estimated with the Stokes-Einstein equation,D_(exp) is of the same order of magnitude as D_(th),the deviation is about 5%.Related error analysis on several possible causes was given in this paper. |
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来源
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实验流体力学
,2008,22(1):84-87,100 【核心库】
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关键词
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布朗运动
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单粒子追踪法
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纳米粒子
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扩散系数
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地址
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中国科学院力学研究所, 非线性力学国家重点实验室, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-9897 |
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学科
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力学;自动化技术、计算机技术 |
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基金
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国家自然科学基金
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国家863计划
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文献收藏号
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CSCD:3216892
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参考文献 共
11
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