Figure 6

Top row: energy (measured relative to the minimum value) of Ag shell (blue), Cu core (red) and whole structure (black) as function of temperature. middle row: average bond length (relative to the minimum value) of Ag-Ag bonds on shell (blue) and Cu-Cu bonds (red) as a function of temperature. bottom row: rate of change of average bond length plots shown in the middle row. The rate of change of average bond length for 127 (solid line) is based on polynomial fit of the relative bond length.