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Title: Inelastic x-ray scattering studies of phonons propagating along the axial direction of a DNA molecule having different counter-ion atmosphere.

Abstract

Shear-aligned 40 wt% calf-thymus Na-DNA molecules in aqueous solutions are prepared in their liquid crystalline phases and studied by high resolution inelastic X-ray scattering (IXS). Measured IXS spectra are analyzed with the generalized three effective eigenmode (GTEE) theory. The phonon dispersion relations along the axial direction of DNA molecules with different MgCl2 concentrations are constructed and compared. It is found that the sound speed along the axial direction of DNA molecules varies only slightly, but the phonon dampening is greatly affected with the increase amount of MgCl{sub 2} concentration. Using the GTEE theory, we are able to extract the longitudinal viscosity in the hydrodynamic limit from the Q-dependence of a fitted parameter. We make a comprehensive review of the GTEE theory and discuss detailed analyses of IXS spectra taking into account finite energy resolution of the instrument.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
925313
Report Number(s):
ANL/XFD/JA-56045
Journal ID: ISSN 0022-3697; JPCSAW; TRN: US0802427
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
J. Phys. Chem. Solids
Additional Journal Information:
Journal Volume: 66; Journal Issue: 2005; Journal ID: ISSN 0022-3697
Country of Publication:
United States
Language:
ENGLISH
Subject:
59 BASIC BIOLOGICAL SCIENCES; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AQUEOUS SOLUTIONS; DISPERSION RELATIONS; DNA; ENERGY RESOLUTION; HYDRODYNAMICS; PHONONS; RESOLUTION; SCATTERING; SPECTRA; VISCOSITY; INELASTIC SCATTERING

Citation Formats

Liu, Y, Berti, D, Baglioni, P, Chen, S H, Alatas, A, Sinn, H, Said, A, Alp, E E, Experimental Facilities Division, Massachusetts Inst. of Technology, and Univ. of Florence. Inelastic x-ray scattering studies of phonons propagating along the axial direction of a DNA molecule having different counter-ion atmosphere.. United States: N. p., 2005. Web. doi:10.1016/j.jpcs.2005.09.017.
Liu, Y, Berti, D, Baglioni, P, Chen, S H, Alatas, A, Sinn, H, Said, A, Alp, E E, Experimental Facilities Division, Massachusetts Inst. of Technology, & Univ. of Florence. Inelastic x-ray scattering studies of phonons propagating along the axial direction of a DNA molecule having different counter-ion atmosphere.. United States. https://doi.org/10.1016/j.jpcs.2005.09.017
Liu, Y, Berti, D, Baglioni, P, Chen, S H, Alatas, A, Sinn, H, Said, A, Alp, E E, Experimental Facilities Division, Massachusetts Inst. of Technology, and Univ. of Florence. 2005. "Inelastic x-ray scattering studies of phonons propagating along the axial direction of a DNA molecule having different counter-ion atmosphere.". United States. https://doi.org/10.1016/j.jpcs.2005.09.017.
@article{osti_925313,
title = {Inelastic x-ray scattering studies of phonons propagating along the axial direction of a DNA molecule having different counter-ion atmosphere.},
author = {Liu, Y and Berti, D and Baglioni, P and Chen, S H and Alatas, A and Sinn, H and Said, A and Alp, E E and Experimental Facilities Division and Massachusetts Inst. of Technology and Univ. of Florence},
abstractNote = {Shear-aligned 40 wt% calf-thymus Na-DNA molecules in aqueous solutions are prepared in their liquid crystalline phases and studied by high resolution inelastic X-ray scattering (IXS). Measured IXS spectra are analyzed with the generalized three effective eigenmode (GTEE) theory. The phonon dispersion relations along the axial direction of DNA molecules with different MgCl2 concentrations are constructed and compared. It is found that the sound speed along the axial direction of DNA molecules varies only slightly, but the phonon dampening is greatly affected with the increase amount of MgCl{sub 2} concentration. Using the GTEE theory, we are able to extract the longitudinal viscosity in the hydrodynamic limit from the Q-dependence of a fitted parameter. We make a comprehensive review of the GTEE theory and discuss detailed analyses of IXS spectra taking into account finite energy resolution of the instrument.},
doi = {10.1016/j.jpcs.2005.09.017},
url = {https://www.osti.gov/biblio/925313}, journal = {J. Phys. Chem. Solids},
issn = {0022-3697},
number = 2005,
volume = 66,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2005},
month = {Sat Jan 01 00:00:00 EST 2005}
}