Void formation and collapse in nanowires

The two-stage process of formation and collapse of hollow nanowires in core-shell systems is described in the framework of the phenomenological model of solid solutions as a result of the competition of the Frenkel effect, Gibbs-Thomson effect, and inverse Kirkendall effect. It is shown that the pore formation is more effective in cylindrical samples as compared to spherical ones, whereas the existence time of a void depends on the nanoshell radius.