Properties and behavior of nanoparticles

Abstract

The methods of obtaining nanomaterials have been described, and the conditions for the formation of nanoparticles of a given size have been assessed. It has been shown that the surface energy of the nano-sized particles, due to a large portion of surface atoms, is significantly greater than the surface energy of the microparticles resulting in the non-equilibrium state of the former with the possibility to self-organize forming, in particular, strong and wear-resistant cladding films from the metallic nanoparticles on the friction surfaces. To explain the interaction of the nanoparticles, which are at the boundary of the quantum and classical states, with the environment, the main provisions of quantum mechanics have been used. The mutual interaction between the bare nanoparticles and between the nanoparticle and a surface, separated by the environment, has been considered. It has been shown that without the stabilization with surfactants, metallic nanoparticles will aggregate; in turn, the nature of the interaction between the nanoparticles with the solid substrates is determined by their dielectric constants. The paper presents an overview of the development of the nanotechnology industry, indicates the commercial demand for nanomaterials, marks the countries that are leaders in the production of nanomaterials, and lists the mainelements used for the production of metallicnanopowders.