Coherency and surface stress effects on phase stability of isolated nanoparticles

Joo Youl Huh, Heon Lee, W. C. Johnson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The coherent phase equilibria of binary nanoparticles, in which three phases can be formed, were examined by accounting for the particle size effect engendered by the surface stress. Considering the system geometry exhibiting radial symmetry, coherent phase diagrams could be constructed for different particle sizes. The phase diagrams exhibited several characteristics of phase equilibria unique to coherent systems. It was found that a positive surface stress results in a radial compressive stress in the particle that is inversely proportional to the particle radius, thereby increasingly stabilizing the phase having a lower molar volume as the particle size decreases.

Original languageEnglish
Title of host publicationDiffusion and Defect Data Pt.B: Solid State Phenomena
Pages979-982
Number of pages4
Volume121-123
EditionPART 2
Publication statusPublished - 2007 Dec 1
EventChina International Conference on Nanoscience and Technology, ChinaNANO 2005 - Beijing, China
Duration: 2005 Jun 92005 Jun 11

Publication series

NameDiffusion and Defect Data Pt.B: Solid State Phenomena
NumberPART 2
Volume121-123
ISSN (Print)10120394

Other

OtherChina International Conference on Nanoscience and Technology, ChinaNANO 2005
CountryChina
CityBeijing
Period05/6/905/6/11

Keywords

  • Coherent phase diagram
  • Misfit strain
  • Nanoparticles
  • Phase stability
  • Surface stress

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Huh, J. Y., Lee, H., & Johnson, W. C. (2007). Coherency and surface stress effects on phase stability of isolated nanoparticles. In Diffusion and Defect Data Pt.B: Solid State Phenomena (PART 2 ed., Vol. 121-123, pp. 979-982). (Diffusion and Defect Data Pt.B: Solid State Phenomena; Vol. 121-123, No. PART 2).