Attractive and repulsive terms in multi-object dispersion interactions

Autor:	Pal, Subhojit, Ninham, Barry W., Dobson, John F., Boström, Mathias
Rok vydání:	2024
Předmět:	Condensed Matter - Materials Science Condensed Matter - Soft Condensed Matter Physics - Biological Physics
Druh dokumentu:	Working Paper
Popis:	We consider the dispersion (van der Waals, vdW) interaction among N parallel elongated objects such as DNA/RNA strands or metallic nanotubes, which are polarizable primarily along the long axis. Within a quasi-one-dimensional model, we prove that the irreducible N -object vdW energy contribution is negative (attractive) for even N and positive (repulsive) for odd N. We confirm these results up to $N=4$ via a 3-dimensional plasma cylinder model. This suggests a preference for even-N clustering of elongated structures in nanoscience and biology. This work could have implications e.g. for nanotube bundle formation and for the clustering of long-chain biomolecules at separations exceeding chemical bond lengths. Comment: 15 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2409.00419 Zobrazit plný text záznamu View this record from Arxiv