The Experts below are selected from a list of 10926 Experts worldwide ranked by ideXlab platform

Hiroshi Noguchi - One of the best experts on this subject based on the ideXlab platform.

  • Estimation of the Bending Rigidity and spontaneous curvature of fluid membranes in simulations
    Physical Review E, 2011
    Co-Authors: Hayato Shiba, Hiroshi Noguchi
    Abstract:

    Several numerical methods for measuring the Bending Rigidity and the spontaneous curvature of fluid membranes are studied using two types of meshless membrane models. The Bending Rigidity is estimated from the thermal undulations of planar and tubular membranes and the axial force of tubular membranes. We found a large dependence of its estimate value from the thermal undulation analysis on the upper-cutoff frequency ${q}_{\mathrm{cut}}$ of the least-squares fit. The inverse power-spectrum fit with an extrapolation to ${q}_{\mathrm{cut}}\ensuremath{\rightarrow}0$ yields the smallest estimation error among the investigated methods. The spontaneous curvature is estimated from the axial force of tubular membranes and the average curvature of bent membrane strips. The results of these methods show good agreement with each other.

  • Estimation of the Bending Rigidity and spontaneous curvature of fluid membranes in simulations.
    Physical review. E Statistical nonlinear and soft matter physics, 2011
    Co-Authors: Hayato Shiba, Hiroshi Noguchi
    Abstract:

    Several numerical methods for measuring the Bending Rigidity and the spontaneous curvature of fluid membranes are studied using two types of meshless membrane models. The Bending Rigidity is estimated from the thermal undulations of planar and tubular membranes and the axial force of tubular membranes. We found a large dependence of its estimate value from the thermal undulation analysis on the upper-cutoff frequency q(cut) of the least-squares fit. The inverse power-spectrum fit with an extrapolation to q(cut)→0 yields the smallest estimation error among the investigated methods. The spontaneous curvature is estimated from the axial force of tubular membranes and the average curvature of bent membrane strips. The results of these methods show good agreement with each other.

Igor S. Burmistrov - One of the best experts on this subject based on the ideXlab platform.

  • absolute poisson s ratio and the Bending Rigidity exponent of a crystalline two dimensional membrane
    Annals of Physics, 2020
    Co-Authors: D. R. Saykin, I. V. Gornyi, Igor S. Burmistrov, Yu V Kachorovskii
    Abstract:

    Abstract We compute the absolute Poisson’s ratio ν and the Bending Rigidity exponent η of a free-standing two-dimensional crystalline membrane embedded into a space of large dimensionality d = 2 + d c , d c ≫ 1 . We demonstrate that, in the regime of anomalous Hooke’s law, the absolute Poisson’s ratio approaches material independent value determined solely by the spatial dimensionality d c : ν = − 1 + 2 ∕ d c − a ∕ d c 2 + … where a ≈ 1 . 76 ± 0 . 02 . Also, we find the following expression for the exponent of the Bending Rigidity: η = 2 ∕ d c + ( 73 − 68 ζ ( 3 ) ) ∕ ( 27 d c 2 ) + … . These results cannot be captured by self-consistent screening approximation.

  • Absolute Poisson's ratio and the Bending Rigidity exponent of a crystalline two-dimensional membrane
    Annals of Physics, 2020
    Co-Authors: D. R. Saykin, I. V. Gornyi, V. Yu. Kachorovskii, Igor S. Burmistrov
    Abstract:

    We compute the absolute Poisson's ratio $\nu$ and the Bending Rigidity exponent $\eta$ of a free-standing two-dimensional crystalline membrane embedded into a space of large dimensionality $d = 2 + d_c$, $d_c \gg 1$. We demonstrate that, in the regime of anomalous Hooke's law, the absolute Poisson's ratio approaches material independent value determined solely by the spatial dimensionality $d_c$: $\nu = -1 +2/d_c-a/d_c^2+\dots$ where $a\approx 1.76\pm 0.02$. Also, we find the following expression for the exponent of the Bending Rigidity: $\eta = 2/d_c+(73-68\zeta(3))/(27 d_c^2)+\dots$. These results cannot be captured by self-consistent screening approximation.

Hayato Shiba - One of the best experts on this subject based on the ideXlab platform.

  • Estimation of the Bending Rigidity and spontaneous curvature of fluid membranes in simulations
    Physical Review E, 2011
    Co-Authors: Hayato Shiba, Hiroshi Noguchi
    Abstract:

    Several numerical methods for measuring the Bending Rigidity and the spontaneous curvature of fluid membranes are studied using two types of meshless membrane models. The Bending Rigidity is estimated from the thermal undulations of planar and tubular membranes and the axial force of tubular membranes. We found a large dependence of its estimate value from the thermal undulation analysis on the upper-cutoff frequency ${q}_{\mathrm{cut}}$ of the least-squares fit. The inverse power-spectrum fit with an extrapolation to ${q}_{\mathrm{cut}}\ensuremath{\rightarrow}0$ yields the smallest estimation error among the investigated methods. The spontaneous curvature is estimated from the axial force of tubular membranes and the average curvature of bent membrane strips. The results of these methods show good agreement with each other.

  • Estimation of the Bending Rigidity and spontaneous curvature of fluid membranes in simulations.
    Physical review. E Statistical nonlinear and soft matter physics, 2011
    Co-Authors: Hayato Shiba, Hiroshi Noguchi
    Abstract:

    Several numerical methods for measuring the Bending Rigidity and the spontaneous curvature of fluid membranes are studied using two types of meshless membrane models. The Bending Rigidity is estimated from the thermal undulations of planar and tubular membranes and the axial force of tubular membranes. We found a large dependence of its estimate value from the thermal undulation analysis on the upper-cutoff frequency q(cut) of the least-squares fit. The inverse power-spectrum fit with an extrapolation to q(cut)→0 yields the smallest estimation error among the investigated methods. The spontaneous curvature is estimated from the axial force of tubular membranes and the average curvature of bent membrane strips. The results of these methods show good agreement with each other.

Jyhpyng Wang - One of the best experts on this subject based on the ideXlab platform.

  • all optical measurements of the Bending Rigidity of lipid vesicle membranes across structural phase transitions
    Physical Review E, 2001
    Co-Authors: Chauhwang Lee, Wanchen Lin, Jyhpyng Wang
    Abstract:

    By exploiting the nanometer sensitivity of the confocal response to the position of an in-focus reflecting surface, we measured the Bending Rigidity of lipid-bilayer vesicles with a noninvasive all-optical method. The vesicles were weakly deformed with femtonewton optical force, and the Bending Rigidity was measured continuously from the ${L}_{\ensuremath{\alpha}}$ through the ${P}_{{\ensuremath{\beta}}^{\ensuremath{'}}}$ to the ${L}_{{\ensuremath{\beta}}^{\ensuremath{'}}}$ phases on the same specimen for the first time. The Bending modulus is found to increase by an order of magnitude from the ${L}_{\ensuremath{\alpha}}$ phase to the ${L}_{{\ensuremath{\beta}}^{\ensuremath{'}}}$ phase, as a result of the increasing area-compressibility modulus and bilayer thickness. The dips of Bending modulus give precisely the main-transition and pretransition temperatures, which supports the recently proposed chain-melting model of pretransition.

Xiao-li Yang - One of the best experts on this subject based on the ideXlab platform.