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Far-infrared vibrational modes of DNA components studied by terahertz time-domain spectroscopy
Abstract
The far-infrared dielectric function of a wide range of organic molecules is dominated by vibrations involving a substantial fraction of the atoms forming the molecule and motion associated with intermolecular hydrogen bond vibrations. Due to their collective nature such modes are highly sensitive to the intra- and intermolecular structure and thus provide a unique fingerprint of the conformational state of the molecule and effects of its environment. We demonstrate the use of terahertz time-domain spectroscopy (THz-TDS) for recording the far-infrared (0.5-4.0 THz) dielectric function of the four nucleobases and corresponding nucleosides forming the building blocks of deoxyribose nucleic acid (DNA). We observe numerous distinct spectral features with large differences between the molecules in both frequency-dependent absorption coefficient and index of refraction. Assisted by results from density-functional calculations we interpret the origin of the observed resonances as vibrations of hydrogen bonds between the molecules.
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Self-citationTerahertz Technology in Biology and Medicine
Siegel, P. H. (2004) · IEEE Transactions on Microwave Theory and Techniques · doi:10.1109/tmtt.2004.835916 · Cited by 1,378
Thin-film sensing with planar terahertz metamaterials: sensitivity and limitations
O'Hara, J. F., Singh, R., Brener, I., Smirnova, E., Han, J., Taylor, A. J., & Zhang, W. (2008) · Optics Express · doi:10.1364/oe.16.001786 · Cited by 521
Potential clinical applications of terahertz radiation
Son, J.-H., Oh, S. J., & Cheon, H. (2019) · Journal of Applied Physics · doi:10.1063/1.5080205 · Cited by 282
Terahertz Time-Domain Spectroscopy of Solids: A Review
Hangyo, M., Tani, M., & Nagashima, T. (2005) · International Journal of Infrared and Millimeter Waves · doi:10.1007/s10762-005-0288-1 · Cited by 258
Metadata
- Authors
- Fischer, B. M., Walther, M., & Jepsen, P. U.
- Venue
- Physics in Medicine and Biology
- Publisher
- IOP Publishing
- Published
- 2002-10-16
- Volume
- 47
- Issue
- 21
- Pages
- 3807-3814
- ISSN
- 0031-9155 (ISSN-L)
- OpenAlex
- W2118065194
- Cited by
- 588
- References
- 1
- FWCI
- 18.93
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fischer, B. M., Walther, M., & Jepsen, P. U. (2002). Far-infrared vibrational modes of DNA components studied by terahertz time-domain spectroscopy. Physics in Medicine and Biology. https://doi.org/10.1088/0031-9155/47/21/319
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