Acta Optica Sinica, Volume. 37, Issue 10, 1029003(2017)
An Optimal Expression for Henry Function for the Calculation of Zeta Potential
The electrophoretic mobility of a charged particle can be determined using the electrophoretic light scattering method. To accurately determine the particle's Zeta potential from the mobility requires the use of Henry function. An optimal expression for Henry function can be fitted by using the least squares algorithm. The thickness of the electric double layer in different concentrations and different types of electrolyte can be calculated using the Gouy-Chapman-Stern double layer model. An accurate value of ka is obtained, here k -1 is the thickness of the double layer and a is the particle radius. The value of ka can be used in the optimal expression to determine an accurate value of Henry function. The particle's Zeta potentials for four different concentrations are measured using this approach. The experimental results show that the optimal Henry function can be used to improve the calculation precision of particle's Zeta potential, and the relative error of the calculation results is less than 1.0%.
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Fuyuan Qin, Wei Liu, Wenjing Wang, C. Thomas John, Yajing Wang, Jin Shen. An Optimal Expression for Henry Function for the Calculation of Zeta Potential[J]. Acta Optica Sinica, 2017, 37(10): 1029003
Category: Scattering
Received: May. 17, 2017
Accepted: --
Published Online: Sep. 7, 2018
The Author Email: Liu Wei (weikey@sdut.edu.cn)