Results 21 to 30 of about 70,428 (160)

Average and extreme multi-atom Van der Waals interactions: Strong coupling of multi-atom Van der Waals interactions with covalent bonding

open access: yesChemistry Central Journal, 2007
Background The prediction of ligand binding or protein structure requires very accurate force field potentials – even small errors in force field potentials can make a 'wrong' structure (from the billions possible) more stable than the single, 'correct ...
Finkelstein Alexei V
doaj   +1 more source

Effects of Van der Waals force on natural frequency for micro cantilever

open access: yesAIP Advances, 2015
In this paper, a dynamics equation of the micro cantilever is presented which includes Van der Waals force. Using the equation, the effects of the Van der Waals force on the natural frequency for the micro cantilever is investigated.
Lizhong Xu, Fengqiang Qian, Yulei Liu
doaj   +1 more source

Review of Adhesion Fundamentals for Micron-Scale Particles

open access: yesKONA Powder and Particle Journal, 2014
The effects of various fundamental forces on the adhesion of fine dust particles are reviewed. The particle-size and distance variation of surface-energy related (e.g., van der Waals) forces are compared to similar ...
Otis R. Walton
doaj   +1 more source

Surface van der Waals forces in a nutshell [PDF]

open access: yesThe Journal of Chemical Physics, 2019
Most often in chemical physics, long range van der Waals surface interactions are approximated by the exact asymptotic result at vanishing distance, the well known additive approximation of London dispersion forces due to Hamaker. However, the description of retardation effects that is known since the time of Casimir is completely neglected for the ...
openaire   +4 more sources

Effects of the van der Waals Force on the Dynamics Performance for a Micro Resonant Pressure Sensor

open access: yesShock and Vibration, 2016
The micro resonant pressure sensor outputs the frequency signals where the distortion does not take place in a long distance transmission. As the dimensions of the sensor decrease, the effects of the van der Waals forces should be considered.
Lizhong Xu, Yulei Liu, Xiaorui Fu
doaj   +1 more source

Molecular forces in electromechanical integrated electrostatic harmonic actuator

open access: yesAIP Advances, 2017
Authors invent an electromechanical integrated electrostatic harmonic actuator. It is more favorable for miniaturization of the electromechanical devices.
Lizhong Xu, Xufei Shi
doaj   +1 more source

Exploring Forces between Individual Colloidal Particles with the Atomic Force Microscope

open access: yesCHIMIA, 2012
Forces between individual colloidal particles can be measured with the atomic force microscope (AFM), and this technique permits the study of interactions between surfaces across aqueous solutions in great detail.
Prashant Sinha   +6 more
doaj   +1 more source

Force of light on a two-level atom near an ultrathin optical fiber

open access: yesNew Journal of Physics, 2018
We study the force of light on a two-level atom near an ultrathin optical fiber using the mode function method and the Green tensor technique. We show that the total force consists of the driving-field force, the spontaneous-emission recoil force, and ...
Fam Le Kien   +6 more
doaj   +1 more source

Adhesive contact analysis between power-law surface and axisymmetric wavy surface considering the van der Waals force

open access: yesNihon Kikai Gakkai ronbunshu, 2015
In the present paper, an adhesive contact between a half-region with axisymmetric wavy surface and a rigid indenter with a profile described by a power-law is analyzed.
Takao HAYASHI, Hideo KOGUCHI
doaj   +1 more source

Particle Entrapment in Line Elastohydrodynamic Contacts and the Influence of Intermolecular (van der Waals) Forces

open access: yesLubricants, 2020
A metallic particle passing through concentrated rolling-sliding contacts is often linked to surface damage for particles larger than the available gap. At the instant of particle pinching, force balancing dictates particle entrapment and passing through
George K. Nikas
doaj   +1 more source

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