广东工业大学学报 ›› 2012, Vol. 29 ›› Issue (1): 5-8.

• 综合研究 • 上一篇    下一篇

光子相关光谱法粒径测量的非负最小二乘法

  

  1. 广东工业大学 实验教学部,广东 广州 510006
  • 出版日期:2012-03-25 发布日期:2012-03-25
  • 作者简介:周述苍(1981-),男,讲师,博士研究生,主要研究方向为光电技术及系统.
  • 基金资助:

    广东工业大学青年基金资助项目(092033)

Nonnegative Least Square Algorithm for Measurement of Particle Size with Photon Correlation Spectroscopy

  1. Experimental Teaching Center, Guangdong University of Technology, Guangzhou 510006, China
  • Online:2012-03-25 Published:2012-03-25

摘要: 介绍光子相关光谱法测量纳米颗粒粒径的基本原理.将非负最小二乘法程序用于光子相关光谱法的反演计算.对4种已知尺寸的单分散纳米颗粒样品,采用非负最小二乘法进行反演测试.并将测试的结果和样品的标称直径以及美国Brookhaven公司仪器的测量结果进行比较.结果显示,非负最小二乘法能够准确地反演出单分散纳米颗粒的粒径大小及粒径分布.

关键词: 光子相关光谱法;非负最小二乘法;粒径测量

Abstract: A nonnegative least square (NNLS) algorithm was applied to inversion computation of particle size distribution in photon correlation spectroscopy. Four monodisperse particle samples were measured by NNLS, and the results were compared with those measured by the instrument of Brookhaven Company and the nominal diameter of the samples. The comparative results show that the nonnegative least square algorithm works precisely on inversion computation of the diameter and size distribution of monodisperse particles.

Key words: photon correlation spectroscopy; nonnegative least square; size measurement

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