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Terahertz Transmission Characteristics of Electrolyte Solution |
QIAN Kun, BAI Zhi-chen, WU Rui, WANG Jia-hui, SU Bo*, WEN Yi-wei, ZHANG Cun-lin |
Beijing Key Laboratory for Terahertz Spectroscopy and Imaging; Key Laboatory of Terahertz Optoelectronics, Ministry of Education; Beijing Advanced Innovation Center for Imaging Theory and Technology, Department of Physics, Capital Normal University, Beijing 100048, China |
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Abstract The vibration and rotational energy levels of many biomacromolecules are in the terahertz band, and the terahertz wave has low photon energy and high peak power. Therefore, detection with terahertz technology can ensure the biological molecules are not destroyed to a large extent. However, most of the biomolecules can maintain their biological activity only in an aqueous solution, and water is a polar molecule, which has strong absorption of terahertz wave, so it is not easy to use conventional terahertz technology to detect the characteristics of biological samples in an aqueous solution. In this paper, a terahertz microfluidic chip with a sandwich structure is designed, including substrate, cover and microchannel layers. The substrate and cover are made of COC and PMMA. COC material has high transparency to terahertz wave and transparent to visible light. It is ideal for making a terahertz microfluidic chips, but it is expensive and hard to obtain. To reduce the amount of COC, the COC is embedded in the PMMA of the substrate and the cover to ensure that the terahertz wave can pass through the COC. The diameter of COC is 5 mm, the thickness is the same as that of PMMA material, both of which are 2 mm, aligned with the center of the microchannel. A strong adhesive double-sided adhesive with a thickness of 50 μm is selected as the microchannel layer, and the center of the double-sided adhesive is hollowed out as the microchannel, with a length of 3 cm and a width of 4 mm. The THz microfluidic chip is composed of substrate, cover and microchannel. The THz detection area is 4 mm in diameter. The combination of microfluidic technology and terahertz technology reduces the consumption of samples, shortens the distance between terahertz wave and samples, and provides the possibility of detecting liquid samples. It is found that the strong absorption of THz wave by water is mainly due to the hydrogen bond in water, while the electrolyte solution will affect the hydrogen bond in water. In this paper, the electrolyte solutions were prepared with different potassium chloride concentrations, potassium sulfate, copper chloride and copper sulfate solutions, and their terahertz transmission spectra were studied by terahertz microfluidic technology. The results show that THz’s transmission intensity of THz of the four electrolyte solutions is lower than that of pure deionized water, but the experimental phenomena are different. The transmission intensity of THz of copper chloride solution increases with the increase of concentration, while potassium chloride, potassium sulfate and copper sulfate solution decreases with the increase of concentration.
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Received: 2020-06-23
Accepted: 2020-10-30
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Corresponding Authors:
SU Bo
E-mail: subo75@cnu.edu.cn
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[1] HONG Wei, YU Chao, CHEN Ji-xin, et al(洪 伟, 余 超, 陈继新, 等). SCIENTIA SINICA Informationis(中国科学: 信息科学), 2016, 46(8): 1086.
[2] ZHAO Guo-zhong, SHEN Yan-chun, LIU Ying(赵国忠, 申彦春, 刘 影). Journal of Electronic Measurement and Instrument(电子测量与仪器学报), 2015, 29(8): 1097.
[3] GUAN Ai-hong, CHAO Yong-yang, LI Zhi(管爱红, 晁永阳, 李 智). China Food Additives(中国食品添加剂), 2019, 30(1): 149.
[4] LIU Ying, ZHAO Guo-zhong, ZHOU Qian, et al(刘 英, 赵国忠, 周 倩, 等). Chinese Journal of Quantum Electronics(量子电子学报),2016, 33(6): 641.
[5] TIAN Qi-li, WEI Peng-fei, JIN Li-fen, et al(田其立, 尉鹏飞, 金丽芬, 等). Shandong Science(山东科学), 2015, 28(3): 88.
[6] WU Jun, TU Hong-qing, CUI Yun-kang, et al(吴 军, 涂宏庆, 崔云康, 等). Computers and Applied Chemistry(计算机与应用化学), 2015, 32(8): 9.
[7] CHEN Jing, PAN Zhang(陈 静, 潘 章). Chemical Research and Application(化学研究与应用), 2015, 27(9): 17.
[8] SHANG Hui, LIU Lu, WANG Han-mo, et al(商 辉, 刘 露, 王瀚墨, 等). CIESC Journal(化工学报), 2019, 70(S1): 23.
[9] LIU Dan-ni, YAN Ke-jun(刘丹妮, 延克军). Bulletin of the Chinese Ceramic Society(硅酸盐通报), 2017, 36(5): 1816.
[10] LIAO Zhi-qiang, LONG Yu-hong, JIANG Wei, et al(廖志强, 龙芋宏, 江 威, 等). Journal of Atomic and Molecular Physics(原子与分子物理学报), 2015, 32(2): 98.
[11] ZHU Xue-wei, CUI Xiao-yu, CAI Wen-sheng, et al(朱雪薇, 崔晓宇, 蔡文生, 等). Acta Chimica Sinica(化学学报), 2018, 76(4): 298.
[12] WU Ya-xiong, SU Bo, HE Jing-suo, et al(武亚雄, 苏 波, 何敬锁, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2019, 39(8): 2348. |
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