Open AccessOn the mechanical stability conditions for nanoparticles in vacuum and under an external pressure
Author(s) -
N.Yu. Sdobnyakov,
V. M. Samsonov,
A. N. Bazulev
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1352/1/012045
Subject(s) - nanoparticle , surface tension , radius , limiting , materials science , helmholtz free energy , tension (geology) , stability (learning theory) , inert , mechanics , constant (computer programming) , composite material , thermodynamics , nanotechnology , chemistry , physics , compression (physics) , mechanical engineering , computer security , organic chemistry , machine learning , computer science , engineering , programming language
A condition of the mechanical stability of non-volatile nanoparticles in a chemically inert medium is derived from the non-negativity of the second variation of the Helmholtz free energy of the ‘small object - gaseous medium’ system. Two cases have been analyzed: (i) a non-volatile nanoparticle with the surface tension depending on its radius; (ii) a limiting case of bigger objects when the surface tension corresponds to its constant macroscopic value. It has been shown that the external pressure should increase stability of nanoparticles. However, the effect under consideration should be noticeable at high pressures only.