Journal
PHYSICA B-CONDENSED MATTER
Volume 425, Issue -, Pages 90-94Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2013.05.025
Keywords
Gibbs free energy; Surface stress; Nanoparticle
Categories
Funding
- National Natural Science Foundation of China [51171064]
- Key Scientific Research Fund of Hunan Provincial Education Department [11A044]
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Two approaches to calculating Gibbs free energy of nanoparticle are compared. It is found that the contribution from the vibrational entropy of surface atoms of nanoparticle to its Gibbs free energy can be ignored, and Jiang et al.'s formula [J. Phys. Chem. B 105 (2001) 6275] [27] for calculating surface stress is only valid around room temperature. Furthermore, an approximate relationship between surface stress and surface free energy of nanoparticles is revealed. Finally, the reason why effect of size dependent surface energy on melting point of nanoparticle was neglected is clarified. (c) 2013 Elsevier B.V. All rights reserved.
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