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Effect of external electric field on the terahertz transmission characteristics of electrolyte solutions |
| Jia-Hui Wang(王佳慧)1,2,3,4, Guo-Yang Wang(王国阳)1,2,3,4, Xin Liu(刘欣)1,2,3,4, Si-Yu Shao(邵思雨)1,2,3,4, Hai-Yun Huang(黄海云)1,2,3,4, Chen-Xin Ding(丁晨鑫)4, Bo Su(苏波)1,2,3,4,†, and Cun-Lin Zhang(张存林)1,2,3,4 |
1 Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China;
2 Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China;
3 Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China;
4 Department of Physics, Capital Normal University, Beijing 100048, China |
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Abstract 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 CuSO4, CuCl2, NaHCO3, Na2CO3 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.
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Received: 19 February 2021
Revised: 15 April 2021
Accepted manuscript online: 08 May 2021
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PACS:
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02.70.Ns
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(Molecular dynamics and particle methods)
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07.10.Cm
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(Micromechanical devices and systems)
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07.57.Hm
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(Infrared, submillimeter wave, microwave, and radiowave sources)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61575131). |
Corresponding Authors:
Bo Su
E-mail: subo75@cnu.edu.cn
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Cite this article:
Jia-Hui Wang(王佳慧), Guo-Yang Wang(王国阳), Xin Liu(刘欣), Si-Yu Shao(邵思雨), Hai-Yun Huang(黄海云), Chen-Xin Ding(丁晨鑫), Bo Su(苏波), and Cun-Lin Zhang(张存林) Effect of external electric field on the terahertz transmission characteristics of electrolyte solutions 2021 Chin. Phys. B 30 110204
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