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《Acta Optica Sinica》 2014-01
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Nanoparticle Sizing by Image Processing with Dynamic Light Scattering

Wang Zhiyong;Cai Xiaoshu;Xu Chengze;Liu Lili;Institute of Particle and Two-Phase Flow Measurement,University of Shanghai for Science and Technology;  
Image processing for nanoparticle sizing with dynamic light scattering(DLS)technique is introduced.A CCD is used to capture the spatial distribution of the scattered light by nanoparticles under Brownian motion.The sizes of the nanoparticles can be determined with the post-processing of the recorded data by calculating the autocorrelation functions of the scattered light.Standard nanoparticles of four different sizes(27,79,482,948 nm) are used in the experiments.Since the frame rate of CCD is far lower than the frequency of photomultiplier,55% glycerol/water emulsion is employed as disperse medium here,therefore.The measurement deviation is dramatically reduced from15.1%to 1.9%in 27 nm nanoparticles at frame rate of 8290 frame/s.Compared with conventional DLS,this technique is advantageous due to the compact and simple measurement system with short measurement time which is 1% of conventional DLS measurement time.
【Fund】: 教育部高等学校博士学科点专项科研基金-优先发展领域项目(20113120130001);; 上海市科委纳米计划项目(11nm0507100)
【CateGory Index】: O439
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