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Molecular dynamics of coalescence and collisions of silver nanoparticles

  • Enrique Guevara-ChapaEmail author
  • Sergio Mejía-Rosales
Research Paper

Abstract

We study how different relative orientations and impact velocity on the collision of two silver nanoparticles affect the first stages of the formation of a new, larger nanoparticle. In order to do this, we implemented a set of molecular dynamics simulations on the NVE ensemble on pairs of silver icosahedral nanoparticles at several relative orientations, that allowed us to follow the dynamics of the first nanoseconds of the coalescence processes. Using bond angle analysis, we found that the initial relative orientation of the twin planes has a critical role on the final stability of the resulting particle, and on the details of the dynamics itself. When the original particles have their closest twins aligned to each other, the formed nanoparticle will likely stabilize its structure onto a particle with a defined center and a low surface-to-volume ratio, while nanoparticles with misaligned twins will promote the formation of highly defective particles with a high inner energy.

Keywords

Molecular dynamics Nanoparticles Silver Coalescence Embedded atom Modeling and simulations 

Notes

Acknowledgments

This work was supported by the Mexican Council for Science and Technology (CONACYT, Mexico), through the project CIAM 148967. Support from UANL, through the project PAICYT CE820-11 is also acknowledged.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Facultad de Ciencias Físico MatemáticasUniversidad Autónoma de Nuevo LeónSan Nicolás de los GarzaMexico
  2. 2.Center for Innovation, Research and Development in Engineering and Technology (CIIDIT), and CICFIM-Facultad de Ciencias Físico MatemáticasUniversidad Autónoma de Nuevo LeónSan Nicolás de los GarzaMexico

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