Ion effects on the structure of water studied by terahertz time-domain spectroscopy

- We have applied THz time-domain spectroscopy to aqueous ionic solutions.
- The dielectric relaxation spectra have been measured in 0.2-1.8 THz.
- Ion-induced deceleration effect of water within the hydration shell was observed.
- Ion-induced long-range structure breaking effect was also confirmed in the spectra.