Hydration dynamics of oriented DNA films investigated by time-domain terahertz spectroscopy
作者： C. Kistner , A. André , T. Fischer , A. Thoma , C. Janke
DOI: 10.1063/1.2743401
关键词: Raman spectroscopy 、 Luminescence 、 Analytical chemistry 、 Terahertz spectroscopy and technology 、 Chemical physics 、 Solvation 、 Chemistry 、 Polarization (waves) 、 Phase transition 、 Spectral line 、 Terahertz radiation
摘要: The B to A conformational transition of highly oriented DNA films due a hydration change is observed with time-domain terahertz spectroscopy. Wet-spun calf thymus and salmon are investigated for different film thicknesses polarizations the radiation relative orientation. clear polarization dependence observed. Asynchronous optical sampling allows recording absorption background spectra in few 10s, permitting tracking dehydration dynamics on time scale minutes. observation phase corroborated by Raman
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