A practical method for examining and calculating van der Waals forces is derived from Lifshitz' theory. Rather than treat the total van der Waals energy as a sum of pairwise interactions between atoms, the Lifs
The significance of the van der Waals (vdW) interaction in the adhesion mechanism of geckos to surfaces is estimated quantitatively using dispersion-corrected density functional theory (DFT). A complete survey of the pairwise energies for the elements present in gecko epithelia, soda lime glass and...
Van Der Waals In subject area: Mathematics A van der Waals fluid is defined as a one-component fluid (or a suspension of monodisperse colloidal particles) with a hard-core repulsion and an additional attractive pair-interaction potential w of infinite range. From: Studies in Interface Science, ...
When mean particle separations become few times larger than van der Waals radius R∼ε1/4, while decreasing ε, the binding energy rapidly vanishes (B→0), but the size barely changes. In this case, particles are far away and pair potentials barely affect the probability outside the range...
A simple semi-empirical approach to the intermolecular potential of van der Waals systemsdoi:10.1080/00268978200100681A simple potential model for the evaluation of isotropic pairwise interaction energies is proposed and used here to predict the lowest triplet state curve of all alkali-alkali ...
Calculations on the vibration–rotation energy levels of the Van der Waals trimers Ar2–HF and Ar2–HCl are carried out, in order to investigate the role of three-body (non-pairwise-additive) forces. The present calculations focus on the lowest Van der Waals vibrational state formed from ...
Chemists generally believe that covalent and ionic bonds form much stronger links between atoms than the van der Waals force does. However, this is not always so. We present cases in which van der Waals dispersive forces introduce new competitive bonding possibilities rather than just modulating tra...
This differs from the single-minimum topology predicted by the commonly used pairwise additive Lennard-Jones potential. For both ab initio and atom—atom model surfaces, the L well is found to be significantly deeper than the T well; this relative behaviour is unchanged by zero-point vibrations...
van der Waals interactionspolymerssequence specificityWe consider the van der Waals interaction between a pair of polymers with quenched heterogeneous sequences of local polarizabilities along their backbones, and study the effective pairwise interaction energy for both stiff polymers and flexible Gaussian ...
which provide exact classical descriptions of the rotational energy dispersions, that is, the dependence of the combined rotational and vibrational energies on the rotational angular momenta, for small molecular clusters bound by van der Waals interactions modeled by pairwise additive (6鈥 12) Lennard...