A. I. Rusanov
St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
Abstract—Generally, nanothermodynamics differs from the thermodynamics of small systems by the need to
taking into account the size dependence of the surface tension of a nanoparticle. Attention is also given to the
development of Gibbs’ thermodynamics, namely, a more rigorous definition of the separating surface and a
more general mechanical equilibrium condition are given. The dependence of the chemical potential of a sub-
stance in the bulk and surface layer of a nanoparticle the size of what – the nanoparticle or the substance is ana-
lyzed with emphasis on the surface tension effect. Stable and unstable equilibrium states during microphase
growth are revealed.
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