Terahertz absorption characteristics of solutions at different pH values

Hai-Yun Huang; Bo Su; Si-Yu Shao; Guo-Yang Wang; Cun-Lin Zhang

doi:10.1117/12.2575304

10 October 2020 Terahertz absorption characteristics of solutions at different pH values

Hai-Yun Huang, Bo Su, Si-Yu Shao, Guo-Yang Wang, Cun-Lin Zhang

Proceedings Volume 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII; 1155915 (2020) https://doi.org/10.1117/12.2575304
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

Water molecules are polar molecules, and intermolecular hydrogen bonds interact strongly with terahertz waves, which makes it very difficult to study the dynamic characteristics of biological samples in aqueous solutions by using terahertz technology. Microfluidic technology is famous for its ability to accurately control micro scale fluid, and its channel depth can reach 50 μm or even smaller. Because microfluidic technology reduces the propagation distance of terahertz wave in the fluid, it greatly reduces the absorption of water to terahertz wave. In addition, pH value also has a certain impact on biological activity. In this study, different pH values are generated by changing the concentration of hydrogen ions and hydroxyl ions in aqueous solution. THz technology and microfluidic technology are combined to explore the THz spectrum characteristics in different pH value of strong acid and alkali solution, and analyze the influence of pH value on the absorption characteristics .

Citation Download Citation

Hai-Yun Huang, Bo Su, Si-Yu Shao, Guo-Yang Wang, and Cun-Lin Zhang "Terahertz absorption characteristics of solutions at different pH values", Proc. SPIE 11559, Infrared, Millimeter-Wave, and Terahertz Technologies VII, 1155915 (10 October 2020); https://doi.org/10.1117/12.2575304

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