Damping of longitudinal waves in colloidal crystals of finite size

Allahyarov, Elshad; Podloubny, LI; Schram, Ppjm Piet; Trigger, S. A.

doi:10.1103/physreve.55.592

Cited by 14 publications

(4 citation statements)

References 10 publications

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“…Recently, the static FK model was studied experimentally in such systems [30]. However, as colloidal crystals have over-damped decay of phonon modes [31], the present results cannot easily be scaled up in the same way.…”

Section: Estimate Of Parametersmentioning

confidence: 91%

The effect of temperature and velocity on superlubricity

Ende

Wijn

Fasolino

2012

J. Phys.: Condens. Matter

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We study the effects of temperature and sliding velocity on superlubricity in numerical simulations of the Frenkel-Kontorova model. We show that resonant excitations of the phonons in an incommensurate sliding body lead to an effective friction and to thermal equilibrium with energy distributed over the internal degrees of freedom. For finite temperature, the effective friction can be described well in terms of a viscous damping force, with a damping coefficient that emerges naturally from the microscopic dynamics. This damping coefficient is a non-monotonic function of the sliding velocity which peaks around resonant velocities and increases with temperature. At low velocities, it remains finite and nonzero, indicating the preservation of superlubricity in the zero-velocity limit. Finally, we propose experimental systems in which our results could be verified.

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Section: Estimate Of Parametersmentioning

confidence: 91%

The effect of temperature and velocity on superlubricity

Ende

Wijn

Fasolino

2012

J. Phys.: Condens. Matter

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“…ÈÈÈ 1 About a linear dependence of the low-frequency oscillation spectrum on wave number in colloidal crystals has been reported in [3,4], where an attempt was done to explain this fact in the frame of hydrodynamics. A more detailed analysis of the experimental results will be done after their publication on the basis of the above developed theory.…”

Section: †Usion-type Surface Oscillations In Thin ðLms Of Plasma-like...mentioning

confidence: 92%

Low-frequency Surface Waves in Thin Films of Plasma-like Media

Rukhadze

Shokri

1998

Phys. Scr.

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The results of theoretical analysis of low-frequency surface waves in thin films of plasma-like media (gaseous plasmas, electron-hole semi-conductor plasma, electron metals plasma) are presented. The wavelengths along the surface are assumed to be much larger than the thickness a of films with sharp boundaries. The mirror reflections of carriers from film surfaces are assumed. The general dispersion relation for surface waves is obtained and investigated in the low-frequency range, where the waves become potential (longitudinal) and the spatial dispersion of dielectric permittivity is essential.

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“…Since the enzyme molecule is very likely not only a passive source of inertia, but may actively participate in the chemical-to-mechanical energy conversion process, we shall adopt a plasma-physical viewpoint in order to deal with protein relaxation dynamics and statistical thermodynamics in response to electrostatic interactions within (or outside) the biomacromolecule. A similar approach was earlier used in the context of DNA polyanions, colloids, and dense polymer blends (see, for example, refs – ). Here we also discuss possible implications of the proposed approach on molecular modeling techniques.…”

Section: Introductionmentioning

confidence: 99%

Chemical-to-Mechanical Energy Conversion in Biomacromolecular Machines: A Plasmon and Optimum Control Theory for Directional Work. 1. General Considerations

2008

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To rationalize coherence and mechanochemical aspects of proteins acting as molecular machines, a plasmon concept for dealing with protein nonequilibrium dynamics is introduced and tested with respect to thermodynamic consistency. A stochastic optimum-control theory for protein conformational diffusion is developed and the corresponding stochastic Newton's second law derived for optimum-controlled conformational diffusion in proteins. The plasmon concept is shown to be consistent with this theory, in that optical plasmons can pump entropy out of (or into) the protein, decreasing (or increasing) its conformational diffusion and, at the same time, help decrease intra- and intermolecular friction, as well as (potentially) break the symmetry of the latter. Instead, acoustic plasmons may break the spatial symmetry of a protein's "potential of mean force", thus converting it into an effective Brownian ratchet potential by applying quasistatic deformational corrections to the former. These concepts seem to be of rather general applicability and might also be useful when studying, for example, intercalation of cationic dyes into DNA duplexes, positively charged oligopeptide transduction through cell membranes, or even DNA translocation through nanopores.

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Damping of longitudinal waves in colloidal crystals of finite size

Cited by 14 publications

References 10 publications

The effect of temperature and velocity on superlubricity

The effect of temperature and velocity on superlubricity

Low-frequency Surface Waves in Thin Films of Plasma-like Media

Chemical-to-Mechanical Energy Conversion in Biomacromolecular Machines: A Plasmon and Optimum Control Theory for Directional Work. 1. General Considerations

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