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    Vibrational properties of C60: A comparison among different inter-atomic potentials

    , Article Computational Materials Science ; Volume 122 , 2016 , Pages 38-45 ; 09270256 (ISSN) Nejat Pishkenari, H ; Ghaf Ghanbari, P ; Sharif University of Technology
    Elsevier  2016
    Abstract
    Using seven bond-order potentials and five force fields, the fundamental natural frequency of C60,Ag(1) (breathing mode), and two other basic modes, namely Hg(1) (squashing mode) and T2g(1) are calculated. The same frequencies are derived through a DFT B3LYP/6-31G(d) calculation. Furthermore, the results are compared with Raman and IR scattering data, and previous quantum mechanics calculations, depicting the strength of each interatomic potential in predicting the vibrational properties of Buckminsterfullerene. AIREBO, which is formulated for analyzing hydrocarbons, shows the highest accuracy among all of the potentials under investigation. In general, bond-order potentials predict a... 

    A close look at the motion of C60 on gold

    , Article Current Applied Physics ; Volume 15, Issue 11 , November , 2015 , Pages 1402-1411 ; 15671739 (ISSN) Pishkenari, H. N ; Nemati, A ; Meghdari, A ; Sohrabpour, S ; Sharif University of Technology
    Elsevier  2015
    Abstract
    In this paper, we have studied the motion of buckminsterfullerene (C60) on a gold surface by analyzing its potential energy and using classical molecular dynamics method. The results can be employed to investigate the motion of C60-based nanocars which have been made in recent years. For this purpose, we have studied the translational and rotational motions of C60 molecule independently. First, we have calculated the potential energy of a C60 molecule on a gold surface in different orientations and positions and employed this data to predict fullerene motion by examining its potential energy. Then we have simulated the motion of C60 at...