Effect of external electric field on the terahertz transmission characteristics of electrolyte solutions

We fabricated a microfluidic chip with simple structure and good sealing performance, and studied the influence of the electric field on THz absorption intensity of liquid samples treated at different times by using THz time domain spectroscopy system. The tested liquids were deionised water and CuS...

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Bibliographic Details
Published in:Chinese physics B 2021-11, Vol.30 (11), p.110204-206
Main Authors: Wang, Jia-Hui, Wang, Guo-Yang, Liu, Xin, Shao, Si-Yu, Huang, Hai-Yun, Ding, Chen-Xin, Su, Bo, Zhang, Cun-Lin
Format: Article
Language:English
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Summary:We fabricated a microfluidic chip with simple structure and good sealing performance, and studied the influence of the electric field on THz absorption intensity of liquid samples treated at different times by using THz time domain spectroscopy system. The tested liquids were deionised water and CuSO 4 , CuCl 2 , NaHCO 3 , Na 2 CO 3 and NaCl solutions. The transmission intensity of the THz wave increases as the standing time of the electrolyte solution in the electric field increases. The applied electric field alters the dipole moment of water molecules in the electrolyte solution, which affects the vibration and rotation of the whole water molecules, breaks the hydrogen bonds in the water, increases the number of single water molecules and leads to the enhancement of the THz transmission spectrum.
ISSN:1674-1056
DOI:10.1088/1674-1056/abff24