Nanoscale physics

Possible way for simplification of theoretical study of interactions in systems of many nanoparticles
Demchenko. H. , Rusinchuk N.
Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska Street, 01033 Kyiv, Ukraine.
E-mail: a.demchenko97@gmail.com

Today nanoparticles and their interactions with other objects are actively used for various purposes, e.g. films epitaxy, gas sensors, high-temperature superconductors, quantum dots, etc. But especially relevant applications of nanoparticles are in biomedicine, such as drug delivery, cancer therapy, enhanced tomography, antiviral and antimicrobial therapy. It is easy to understand, that it is useful to theoretically describe all the interactions in systems of many nanoparticles [1]. 

Fig. 1. Sketch of the system

The goal of the work is to theoretically estimate the distance between the nanoparticles, where the interaction between them becomes negligible. Interaction in the system ‘virus-two nanoparticles’ (Fig. 1) has been studied. We calculated the adsorption potential between the virus and the nanoparticle and simulated the local field distribution in the system. The condition of the interaction smallness, when it can be neglected is proposed.
Obtained results show that interaction between nanoparticles can be neglected if the distance between them is at least around the nanoparticle size. The results describe the experimental effects [3]. The approach can be used for description interactions in the system of many nanoparticles, including the antiviral effect of nanoparticles.

1.	Pankhurst Q. A., Connolly J., Jones S. K., and Dobson J. Applications of magnetic nanoparticles in biomedicine // Journal of Physics D: Applied Physics-2003.-36.-P. 167-181.
2.	Su K.-H., Wei Q.-H., Zhang X., Mock J. J., Smith D. R., and Schultz S. Interparticle Coupling Effects on Plasmon Resonances of Nanogold Particles // Nano Letters-2003.-3.-P. 1087-1090.