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Poisson's Ratio and Young's Modulus of Lipid Bilayers in Different Phases.

Jadidi T, Seyyed-Allaei H, Tabar MR, Mashaghi A - Front Bioeng Biotechnol (2014)

Bottom Line: As an example for the coarse grained lipid model introduced by Lenz and Schmid, we calculate the Poisson's ratio in the gel, fluid, and interdigitated phases.Having the Poisson's ratio, enable us to obtain the Young's modulus for the membranes in different phases.The approach may be applied to other membranes such as graphene and tethered membranes in order to predict the temperature dependence of its Poisson's ratio and Young's modulus.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Osnabrück , Osnabrück , Germany.

ABSTRACT
A general computational method is introduced to estimate the Poisson's ratio for membranes with small thickness. In this method, the Poisson's ratio is calculated by utilizing a rescaling of inter-particle distances in one lateral direction under periodic boundary conditions. As an example for the coarse grained lipid model introduced by Lenz and Schmid, we calculate the Poisson's ratio in the gel, fluid, and interdigitated phases. Having the Poisson's ratio, enable us to obtain the Young's modulus for the membranes in different phases. The approach may be applied to other membranes such as graphene and tethered membranes in order to predict the temperature dependence of its Poisson's ratio and Young's modulus.

No MeSH data available.


Related in: MedlinePlus

Fluctuation spectra for the fluid, gel, and interdigitated phases and fits to the Eq. (5).
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Figure 5: Fluctuation spectra for the fluid, gel, and interdigitated phases and fits to the Eq. (5).

Mentions: The values obtained for the bending rigidity kc are 5.2ϵ for the fluid phase, and 7.6ϵ for the interdigitated phase. For the gel and fluid phases, the results agree with the previous computational reports (West, 2008; West et al., 2009) and experimental findings (Falcioni et al., 1997; Liu and Zhang, 2009). The spectral density for the interdigitated phase was calculated according to the same method. We report here bending rigidity for interdigitated phase. Figure 5 illustrates the fluctuation spectra of the height for three studied phases and fits to the Eq. (5).


Poisson's Ratio and Young's Modulus of Lipid Bilayers in Different Phases.

Jadidi T, Seyyed-Allaei H, Tabar MR, Mashaghi A - Front Bioeng Biotechnol (2014)

Fluctuation spectra for the fluid, gel, and interdigitated phases and fits to the Eq. (5).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126470&req=5

Figure 5: Fluctuation spectra for the fluid, gel, and interdigitated phases and fits to the Eq. (5).
Mentions: The values obtained for the bending rigidity kc are 5.2ϵ for the fluid phase, and 7.6ϵ for the interdigitated phase. For the gel and fluid phases, the results agree with the previous computational reports (West, 2008; West et al., 2009) and experimental findings (Falcioni et al., 1997; Liu and Zhang, 2009). The spectral density for the interdigitated phase was calculated according to the same method. We report here bending rigidity for interdigitated phase. Figure 5 illustrates the fluctuation spectra of the height for three studied phases and fits to the Eq. (5).

Bottom Line: As an example for the coarse grained lipid model introduced by Lenz and Schmid, we calculate the Poisson's ratio in the gel, fluid, and interdigitated phases.Having the Poisson's ratio, enable us to obtain the Young's modulus for the membranes in different phases.The approach may be applied to other membranes such as graphene and tethered membranes in order to predict the temperature dependence of its Poisson's ratio and Young's modulus.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Osnabrück , Osnabrück , Germany.

ABSTRACT
A general computational method is introduced to estimate the Poisson's ratio for membranes with small thickness. In this method, the Poisson's ratio is calculated by utilizing a rescaling of inter-particle distances in one lateral direction under periodic boundary conditions. As an example for the coarse grained lipid model introduced by Lenz and Schmid, we calculate the Poisson's ratio in the gel, fluid, and interdigitated phases. Having the Poisson's ratio, enable us to obtain the Young's modulus for the membranes in different phases. The approach may be applied to other membranes such as graphene and tethered membranes in order to predict the temperature dependence of its Poisson's ratio and Young's modulus.

No MeSH data available.


Related in: MedlinePlus