| 个人简介 | |
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 Prof. Jin Shen Shandong University of Technology, China |
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| 标题： On the Particle Size Information Utilization in Multi-angle Dynamic Light Scattering for Nanoparticle Measurement | |
| 摘要：
In particle size measurement with dynamic light scattering, it is still difficult to accurately recover the broad or bimodal particle size distribution (PSD), since the PSD information in the autocorrelation function (ACF) was not being fully utilized. In this work, a method of successive updating of the angular weighting(SUAW) is proposed for the angular weighting calculation. By successive information weighting, the noise of the long delay section of the ACF is further weakened and the information extraction of the middle delay section of the ACF is further strengthened. Compared with the routine inversion approaches, SUAW method could provide better inversion results of the broad distribution and near bimodal distribution particles. In the comparison, it is also shown that an accurate angular weighting calculation could reduce the number of scattering angles required and, during the successive updating of the angular weighting, the repeated weighting did not only contribute to the accuracy of the angular weightings, an indirect approach acting on inversed PSDs, but also directly to PSD inversions by reconstructing ACFs with PSDs obtained by weighted inversion. The combination of these two contributions both reduces the number of scattering angles needed, and keeps the PSD inversions from getting worse caused by excessive scattering angles.
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| 简介：
Professor Jin Shen obtained his B.S. degree from Northeast Heavy Machinery Institute in 1985, the M.S. degree from China Agricultural University in 1996, and his Ph.D. degree from University of Shanghai for Science and Technology in 2004. He is currently a professor in School of Electrical and Electronic Engineering at Shandong University of Technology. His current research interests involve light scattering measurement and weak signal detection. He has completed over 30 research projects, published over 200 scientific papers, and received the Science-Technology Progress Prize of Shandong Province for three times. He was a Visiting Professor at University of South Australia from Jun to December 2010, and Visiting Researcher at Kansas State University from October 2012 to August 2013.
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