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Properties of rotating nanoalloys formed by cluster collision: A computer simulation study
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View: Figures


Image of FIG. 1.
FIG. 1.

Model system illustrating the definition of the distances r 1, r 2, and d employed to define the impact parameter ξ = d/(r 1 + r 2).

Image of FIG. 2.
FIG. 2.

Snapshots taken from the molecular dynamics simulations at different impact parameters and momentum p. The latter is reported in terms of the quantity , where μ is the reduced mass (top: 200 m/s and bottom: 400 m/s). Golden spheres correspond to Au, gray spheres to Pt [enhanced online (see Ref. 19)].

Image of FIG. 3.
FIG. 3.

Potential energy contributions upon collision of a Au586 with a Pt586 cluster at two different collision momentum: 200 m/s (left) and 400 m/s (right).

Image of FIG. 4.
FIG. 4.

“Internal vibrational” energy (left panel) and rotational energy of the system at different impact parameters.

Image of FIG. 5.
FIG. 5.

Ratio of rotational energy to kinetic energy ηrot for different impact parameters (left) and momenta (right). The colliding clusters were: (a) Au586–Pt586, (b) Au586–Au586, and (c) Pt586–Pt586.

Image of FIG. 6.
FIG. 6.

“Ordered” or “disordered” character of the structure of the metallic components participating in the collision, as inferred from the Au–Au and Pt–Pt radial distribution functions. The nature of the clusters and the metal analyzed are indicated at the top of each matrix. Typical distribution functions are shown in the insets.

Image of FIG. 7.
FIG. 7.

“Instantaneous” temperature τ of the system at a collision time of 40 ps for the collision of Au–Au and Au–Pt clusters at different ξ and .

Image of FIG. 8.
FIG. 8.

(a) Phase diagram of the triaxial shapes. (b) Triaxial parameter as a function of time for collisions at different impact parameters (0, 0.25, 0.49, 0.74, and 0.98).

Image of FIG. 9.
FIG. 9.

Parameter κ for the separated components of the systems for some typical conditions of the collisions considered in the present work. Plots on the right column correspond to the Pt component, plots on the left column to Au. The corresponding ξ values are inserted in the plot.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Properties of rotating nanoalloys formed by cluster collision: A computer simulation study