Dielectric properties of water and NaCl solutions investigated by terahertz time-domain spectroscopy

He Cai; Wei Chen; Xianli Zhu; Liangsheng Li; Jinchun Li; Xutao Zhang

doi:10.1117/12.2615003

15 February 2022 Dielectric properties of water and NaCl solutions investigated by terahertz time-domain spectroscopy

He Cai, Wei Chen, Xianli Zhu, Liangsheng Li, Jinchun Li, Xutao Zhang

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121662F (2022) https://doi.org/10.1117/12.2615003
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

We have used Terahertz time-domain spectroscopy(TDS) to investigate the dielectric properties of water and water solutions of containing different ions. The complex permittivity of NaCl solutions, for different concentrations of ions, was obtained by attenuated total reflection(ATR) method. We have observed that, when increasing o ion concentration, the real part and imaginary part of the permittivity are increased. Furthermore, we also calculate the dielectric constant of ionic aqueous solutions with different concentrations based on molecular dynamics method. The simulation method, based on Newton mechanics, can estimate the dielectric constant of liquid substances without the experimental limitation.

Citation Download Citation

He Cai, Wei Chen, Xianli Zhu, Liangsheng Li, Jinchun Li, and Xutao Zhang "Dielectric properties of water and NaCl solutions investigated by terahertz time-domain spectroscopy", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121662F (15 February 2022); https://doi.org/10.1117/12.2615003

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