Terahertz Reflection Spectroscopy of Aqueous NaCl and LiCl Solutions

被引：35
作者：
Jepsen, Peter Uhd [1 ]
Merbold, Hannes [2 ]
机构：
[1] Tech Univ Denmark, Foton Dept Photon Engn, DK-2800 Lyngby, Denmark
[2] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland
来源：
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES | 2010年 / 31卷 / 04期
关键词：
Terahertz time-domain spectroscopy; Electrolyte solution; Debye relaxation; Dielectric function; DIELECTRIC-RELAXATION; ELECTROLYTE SOLUTIONS; HYDRATION NUMBER; WATER; DYNAMICS; PERMITTIVITY; PROPAGATION; LIQUIDS;
D O I：
10.1007/s10762-009-9603-6
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present spectroscopic measurements of the full dielectric function of aqueous solutions of sodium chloride and lithium chloride at concentrations approaching their solubility limits at room temperature. We find that the dielectric properties of the two salts are rather different at THz frequencies. Whereas both the real and imaginary part of the permittivity of NaCl increases with concentration, we see that the imaginary part of the permittivity of LiCl (related to the absorption) decreases with increasing salt concentration. We relate these changes to the behavior of slow and fast Debye relaxation processes in the solutions.
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页码：430 / 440
页数：11
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