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A molecular dynamics study: structural and thermal evolution of 147 atom ComAun nanoalloys

  • Haydar ArslanEmail author
  • Ali Kemal Garip
  • Songül Taran
Research Paper
  • 29 Downloads

Abstract

In this study, the classical molecular dynamics simulations in canonical ensemble conditions (NVT) were used to investigate the dynamical properties of bimetallic Co–Au nanoalloy clusters with the interatomic interactions modeled by Gupta many-body potential. Global optimizations were performed using basin-hopping algorithm for all compositions of 147 atom Co–Au bimetallic clusters. A structure based on icosahedron was obtained for the majority of the compositions. Structural analysis results showed that lower surface and cohesive energy of Au atoms give rise to Au atoms on the surface sites preferably. The global minimum structures were taken as the initial configurations for MD simulations. We obtained caloric curves and also Lindemann parameters to investigate melting transitions. In general, the melting temperatures were fluctuated around 675 K for Au-rich compositions and 750 K for Co-rich compositions.

Keywords

Au-Co nanoalloys Structural stability Melting dynamics Modeling and simulation 

Notes

Funding information

Support was from Bülent Ecevit University Scientific Research Projects Coordinatorship foundation with the project code 2016-22794455-02.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of PhysicsZonguldak Bulent Ecevit UniversityZonguldakTurkey
  2. 2.Department of PhysicsDuzce UniversityDuzceTurkey

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