Open AccessThe Role of Phonons in Stability of Metallic Nanoparticles
Author(s) -
В. Л. Орлов,
А. В. Орлов
Publication year - 2020
Publication title -
sibirskij fizičeskij žurnal
Language(s) - English
Resource type - Journals
ISSN - 2541-9447
DOI - 10.25205/2541-9447-2020-15-2-97-104
Subject(s) - nanoparticle , materials science , phonon , particle (ecology) , metal , condensed matter physics , melting temperature , nanotechnology , shell (structure) , composite material , chemical physics , physics , metallurgy , oceanography , geology
A novel model of a metallic nanoparticle is proposed. The model represents the nanoparticle as a hollow sphere. The existence of a nanohollow inside a particle is related to the behavior of phonons. The strain in the walls of a particle when it's heated is calculated utilizing the theory of a thick-walled shell. We show that in the transition to the elastic state, the expansion strains at the surface of a nanoparticle become sufficient for melting. The dependency of melting temperature on the size of a nanoparticle is discussed.