A thermodynamic approach to mechanical stability of nanosized particles

• Authors: Vladimir Samsonov , Nikolay Sdobnyakov
• Languages of publication: EN

Abstracts

EN

Thermodynamic stability conditions for nanoparticles (resulting from non-negativity of the second variation of the free energy) have been analyzed for two cases: (i) a nonvolatile nanosized particle with the size-dependent surface tension; (ii) the limiting case of larger objects when the surface tension takes its macroscopic value. It has been shown that the mechanical stability of a nanoparticle, i.e. its stability relative to the volume fluctuations, is defined by an interplay between the excess (“surface”) free energy and the volumetric elastic energy. According to the results obtained, noble gas clusters and metal nanoparticles satisfy the mechanical stability condition. At the same time, water nanodrops, as well as nanoparticles presented by nonpolar organic molecules, correspond to the stability limit. Among the investigated systems, the stability condition is not carried out for n-Pentane clusters.

Keywords

EN

Theoretical methods; equilibrium thermodynamics and statistical mechanic; stability; surface energy; elastic energy; surface structure; surface thermodynamics; surface tension; isothermal compressibility; nanopericles; clusters; 68.03.Cd; 81.07.-b; 05.70.Np

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2003
• Volume: 1
• Issue: 2
• Pages: 344-354

Dates

published

1 - 6 - 2003

online

1 - 6 - 2003

Contributors

author

Vladimir Samsonov

• Theoretical Physics Department, Tver State University, 170024 Sadovii side-street, 35, Tver, Russia

author

Nikolay Sdobnyakov

• Theoretical Physics Department, Tver State University, 170024 Sadovii side-street, 35, Tver, Russia

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Identifiers

DOI

10.2478/BF02476301