摘要
激光多普勒电泳光散射法是测量胶体溶液中纳米颗粒表面Zeta电位的标准方法之一,然而该技术的测量准确度往往受低频噪声分量以及自相关函数自身误差的影响。为了提高该技术的测量准确度和重复性,采用基于希尔伯特-黄变换的分析方法。该方法对散射光强自相关信号进行经验模式分解,剔除低频噪声以及自相关函数自身误差的干扰,再对信号进行重构。仿真结果和实验结果均验证了该方法是可行和有效的。
Laser Doppler eleetrophoretic light scattering is one of the standard methods for measuring the zeta potential of nanoparticles. However, the signal is usually mixed with the low frequency noises and the deviation from mathematical model of autocorrelation function. We introduced the Hilbert-Huang transform into the data analysis of the measurement in order to improve the measurement accuracy. After decomposing the original signal into several intrinsic modes, we found that by eliminating the low frequency noises and the deviation from mathematical model of autocorrelation function, the reconstructed signal was greatly improved. The simulated and experimental results demonstrate the feasibility and validity of this method.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第1期286-293,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61371176)
广东省自然科学基金(2014A030313433)
