Funct. Mater. 2023; 30 (4): 571-579.
Relaxation of pores in nanoclusters
1Institute for Single Crystals, NAS Ukraine, 60 Nauky Ave., Kharkiv, 61001, Ukraine2V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022, Ukraine
Relaxation of a solid nanocluster with an internal pore was invrstigated using the molecular dynamics method. The distribution function for the lifetime of a pore in a cluster is construted. According to the simulation data, it is close to an exponential distribution funtion. It was shown that clusters in which pore relaxation occurs during simulation demonstrate two relaxation mehanisms. An explanation based on interaction of three vibrational modes is proposed for an unusual explosive relaxation mehanism as a consequence of the resonant interaction of two surface vibration modes wit the pore vibrational mode. The simulation data are in good agreement with theoretical explanation.The features of pore relaxation in clusters are also disussed in detail.
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