Molecular Dynamics Simulations of Nanoparticle-Surface Collisions in Crystalline Silicon


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We present a microscopic description for the impacting process of silicon nanospheres onto a silicon substrate. In spite of the relatively low energy regime considered (up to 1 eV/atom), the impacting process exhibits a rich behavior: A rigid Hertzian model is valid for speeds below 500 m/s, while a quasi-ellipsoidal deformation regime emerges at larger speeds. Furthermore, for speeds up to 1000 m/s the particle undergoes a soft landing and creates a long-lived coherent surface phonon. Higher speeds lead to a rapid attenuation of the coherent phonon due to a partial diamond cubic to-tin phase transformation occurring in the particle.



Edited by:

N. Ali






P. Valentini and T. Dumitrica, "Molecular Dynamics Simulations of Nanoparticle-Surface Collisions in Crystalline Silicon ", Journal of Nano Research, Vol. 1, pp. 31-39, 2008

Online since:

January 2008


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