van der Waals force

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van der Waals force

n.
A weak, short-range attractive force between atoms or molecules caused by their dipole moments, often arising in otherwise nonpolar atoms or molecules from a temporary shift of orbital electrons to one side of one atom or molecule.

[After Johannes Diderik van der Waals.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

van der Waals force

(văn′ dər wôlz′)
A weak force of attraction between electrically neutral molecules that collide with or pass very close to each other. The van der Waals force is caused by temporary attractions between electron-rich regions of one molecule and electron-poor regions of another. These attractions are very common but are much weaker than chemical bonds. The van der Waals force is what allows water vapor to condense into liquid water.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations
van der Waalsin voima
van der Waalskracht
van der Waalskraft
References in periodicals archive ?
Physical adsorption via hydrogen bond or van der Waals interaction does not cause any considerable modification in CNTs [65, 66].
Different with the doped system, the [H.sub.2] molecule only shows the physical adsorption on intrinsic graphene with weak van der Waals interaction between them [20].
[N.sub.R] = dp/dc (aspect ratio), [N.sub.pe] = v x dc/ (kT/3[pi]dp[my]) (Peclet number characterizing the ratio of convective to diffusive transport, [N.sub.vdw] = A/kT (van der Waals number characterizing the ratio of van der Waals interaction energy to the particle's thermal energy; A is the Hamaker constant of the interacting media, i.e.
The main type of interaction was a Van der Waals interaction with the TYR 35, TRP 84, SER 105, VAL 108, ARG 167, and ILE 288 residues.
Further delineating the intermolecular interactions reveals that the Phe134, Ile305, Ala306, Asp309, Thr310, Leu372, Leu477, and Ser478 have been involved in the van der Waals interaction and Ile133, Trp224, Trp224, Val370, and Val373 have formed the alkyl/rc-alkyl bonds.
Based on (1)~(13), the van der Waals interaction energies, electrical interaction energies, and polar interfacial interaction energies between magnesite, dolomite, serpentine, and quartz particles in the absence and presence of DDA (8.6 x [10.sup.-4] M) at pH 9.5 are calculated and illustrated in Figures 14-18.
The model whose PMF is analyzed here under various circumstances is based on the competition between the attractive van der Waals interaction between particles and the repulsion between the particles' polymer coating.
Bundles of CNT encapsulated with catalyst were the result of van der Waals interaction force exists between the CNT [19].
The results confirmed that van der Waals interaction between the [O.sub.1]-[O.sub.2] atoms.
The result shows that the ultimate stress afforded by van der Waals interaction is achieved when the strain rate is 0.0091%, and the interfacial slip begins to occur.
It was found to form hydrogen bonding (Figure 5), hydrophobic bonding (Figure 6), and van der Waals interaction. Amongst all the analogs, A3 was not found to exhibit hydrogen bonding with the receptor through "O" of -OH of Phosphoramidon moiety.