Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength

Lee, Victor; Hawa, Takumi

doi:10.1063/1.4821816

Title: Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength

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Abstract

The effect of bilayer membrane structures and fluctuation amplitudes on small angle neutron scattering (SANS) and small angle X-ray scattering (SAXS) profile is investigated based on harmonic motions of the surfactant bilayers with bending as well as thickness fluctuation motions. In this study we consider the case in which the wavelength of the bilayer membrane is shorter than the thickness of the membrane. We find that the thickness of the surfactant bilayer membrane, d{sub m}, affects both q{sub dip} and q{sub peak} of I(q,0) profile, and that the fluctuation amplitude, a, of the membrane changes the peak of I(q,0). A simple formula is derived to estimate the thickness of the bilayer based on the q{sub dip} of the profile obtained from the simulation. The resulting estimates of the thickness of the bilayer with harmonic motion showed accuracy within 1%. Moreover, the bilayer thicknesses estimated from the proposed formula show an excellent agreement with the SANS and SAXS experimental results available in the literatures. We also propose a curve fit model, which describes the relationship between the fluctuation amplitude and the normalized q{sub peak} ratio. The present results show the feasibility of the simple formula to estimate the fluctuation amplitude basedmore » on the SANS and SAXS profiles.« less

Authors:

Lee, Victor; Hawa, Takumi ^[1]

School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, Oklahoma 73019 (United States)

Publication Date:: Sat Sep 28 00:00:00 EDT 2013

OSTI Identifier:: 22220422

Resource Type:: Journal Article

Journal Name:: Journal of Chemical Physics

Additional Journal Information:: Journal Volume: 139; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 60 APPLIED LIFE SCIENCES; 62 RADIOLOGY AND NUCLEAR MEDICINE; ACCURACY; CRYSTALLOGRAPHY; FLUCTUATIONS; LAYERS; MEMBRANES; NEUTRON DIFFRACTION; PEAKS; SIMULATION; SMALL ANGLE SCATTERING; THICKNESS; WAVELENGTHS; X-RAY DIFFRACTION

Citation Formats


                    Lee, Victor, and Hawa, Takumi. Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength.  United States: N. p., 2013. 
        Web.  doi:10.1063/1.4821816.

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                    Lee, Victor, & Hawa, Takumi. Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength.  United States.  https://doi.org/10.1063/1.4821816

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                    Lee, Victor, and Hawa, Takumi. 2013.  
        "Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength".  United States.  https://doi.org/10.1063/1.4821816.

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@article{osti_22220422,

  title        = {Investigation of the effect of bilayer membrane structures and fluctuation amplitudes on SANS/SAXS profile for short membrane wavelength},

  author       = {Lee, Victor and Hawa, Takumi},

  abstractNote = {The effect of bilayer membrane structures and fluctuation amplitudes on small angle neutron scattering (SANS) and small angle X-ray scattering (SAXS) profile is investigated based on harmonic motions of the surfactant bilayers with bending as well as thickness fluctuation motions. In this study we consider the case in which the wavelength of the bilayer membrane is shorter than the thickness of the membrane. We find that the thickness of the surfactant bilayer membrane, d{sub m}, affects both q{sub dip} and q{sub peak} of I(q,0) profile, and that the fluctuation amplitude, a, of the membrane changes the peak of I(q,0). A simple formula is derived to estimate the thickness of the bilayer based on the q{sub dip} of the profile obtained from the simulation. The resulting estimates of the thickness of the bilayer with harmonic motion showed accuracy within 1%. Moreover, the bilayer thicknesses estimated from the proposed formula show an excellent agreement with the SANS and SAXS experimental results available in the literatures. We also propose a curve fit model, which describes the relationship between the fluctuation amplitude and the normalized q{sub peak} ratio. The present results show the feasibility of the simple formula to estimate the fluctuation amplitude based on the SANS and SAXS profiles.},

  doi          = {10.1063/1.4821816},

  url          = {https://www.osti.gov/biblio/22220422},
  journal      = {Journal of Chemical Physics},

  issn         = {0021-9606},

  number       = 12,

  volume       = 139,

  place        = {United States},

  year         = {Sat Sep 28 00:00:00 EDT 2013},

  month        = {Sat Sep 28 00:00:00 EDT 2013}

}

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