Program

P.25 -- Poster, NCTP-42

Date: Tuesday, 1 August 2017

Time: 16h00 - 17h30

Drude-jellium model for microwave conductivity of electrolyte solutions

Tran Thi Nhan(1), Luong Thi Theu(2), Le Tuan(3) and Nguyen Ai Viet(4)

(1)Hanoi University of Industry, 298 Cau Dien Road, Hanoi (2)Hanoi Pedagogical University Number 2, Xuan Hoa, Vinh Phuc (3)Hanoi University of Science and Technology, 1 Dai Co Viet Road, Hanoi (4)Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi

Characterization of static conductivity of electrolyte solutions at microwave frequencies plays an important role in fundamental process of biology and chemistry, for examples, electrokinetic phenomena, charge transfer in living cell, electrolysis. Recently, the microwave conductivity of the salt solution was determined with a rather accuracy by measuring its dielectric constant on the basis of combination between the Debye and Drude models. In this work, we consider that the electrolyte solution is a plasma consisting of ions with water background. Using the jellium theory, its plasmon frequency is calculated. Moreover, we can provide the relation to determine the static conductivity of the electrolyte solutions by the combination between this plasmon relationship and the Drude formula for dielectric constant. Our approach gives a good agreement between calculations and experimental data. We can estimate the value of the damping coefficient for the conductive solutions at low frequencies. Our study also predicts the microwave conductivity for a variety of salts with a wide range of concentrations by using the microfield approach.

Presenter: Tran Thi Nhan