一种新的动态光散射纳米颗粒反演算法

由于传统累积量反演算法计算结果随相关时间的变化有较大的波动,提出一种新的累计量算法,此方法直接利用光子相关光谱函数作为目标函数进行反演,减少相关时间选择对测量结果的影响.在介绍传统累积量光子相关光谱法颗粒粒径分布反演算法的基础上,引入以光子相关光谱函数作为累积量算法的目标函数的反演算法,利用实验平台对90 nm的乳胶颗粒进行测量.运用实验获得的相关函数数据研究两种累积量算法和相关时间之间的关系,实验结果表明,采用传统累计量算法其结果受相关时间影响较大,而本文所提算法稳定性好,在较长相关时间范围内基本不受相关时间影响.

A Novel Dynamic Light Scattering Inversion Algorithm for Nano-Meter Particles

When the traditional cumulant algorithm is used to analyze dynamic light-scattering data measured for polydisperse samples,the result of the average particle deviates from the true value with the correlation time range.We proposed a novel cumulant method,which uses the photon correlation spectrum function as the objective function to inverse the particle diameter directly.The experiment was performed with 90nm latex particles in laboratory.Comparing result shows that the particle diameter is unstable in a w...