Determination of relaxation time of DNA hydration water by THz-TDS

Author

Son, Heyjin ; Choi, Da-Hye ; Jung, Seonghoon ; Park, Jaehun ; Park, Woong-Yang ; Kwon, Oh Sang ; Park, Gun-Sik

Author_Institution

Dept. of Phys. & Astron., Seoul Nat. Univ., Seoul, South Korea

fYear

2012

fDate

23-28 Sept. 2012

Firstpage

1

Lastpage

2

Abstract

Interaction of DNA and hydration water affects both structure and function of DNA. Here, we find out the relaxation time of DNA hydration water probed by THz-TDS under biological condition. Double Debye relaxation model is applied for figuring out relaxation time of hydration water. We observed 14.9ps for 50mM of DNA solution. This is much slower compared to bulk water, 8.15ps. The results indicate the existence of slow hydration water around DNA.

Keywords

DNA; molecular biophysics; molecular configurations; solvation; terahertz wave spectra; water; DNA function; DNA hydration water; DNA structure; DNA-hydration water interaction; H₂O; THz-TDS; double Debye relaxation model; relaxation time determination; slow hydration water; time 14.9 ps; Biological system modeling; DNA; Dielectric constant; Educational institutions; Fitting; Molecular biophysics;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on

Conference_Location

Wollongong, NSW

ISSN

2162-2027

Print_ISBN

978-1-4673-1598-2

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/IRMMW-THz.2012.6380182

Filename

6380182