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Nucleation and growth model for {110}- and {111}-truncated nanoparticles

Published online by Cambridge University Press:  15 September 2015

Nicholas J. Jones ,
Raja Swaminathan ,
Michael E. McHenry  and
David E. Laughlin
Nicholas J. Jones*
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Raja Swaminathan
Affiliation:
Intel Corporation, Chandler, Arizona 85226, USA
Michael E. McHenry
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
David E. Laughlin
Affiliation:
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Nanoparticle-sized powders have seen more and more use in many of today's applications. As particle size decreases, many properties change including the ability to embed the small particles in liquids and other media. With decreasing size, however, surface energy becomes more important and can dictate the final shape of the particle. In applications based on polar molecules attaching to the nanoparticle surface, the surface morphology can become a key design parameter. A nucleation and growth model has been constructed for truncated body-centered cubic derivative materials, along with an update to previously published work on face-centered cubic materials. The model shows that for (110)- and (111)-truncations of a cube with a specified surface energy for each surface, the critical nuclei and equilibrium growth shapes are the same, supporting the theory of self-similar growth that had only been mentioned previously, but never proven. In this analysis, saddle points play an important role in determining the critical nuclei for comparison with the equilibrium growth shapes.

Keywords

nucleation and growthnanoscalesimulation
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 20 , 28 October 2015 , pp. 3011 - 3019
Copyright
Copyright © Materials Research Society 2015 

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References

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