Size-dependent eutectic temperature of Ag-Pb alloy nanoparticles.

: In terms of size-dependent cohesive energy model, we have deduced an analytic model to describe the size dependence of the eutectic temperature for Ag-Pb alloy nanoparticles. The eutectic temperature is found to drop with decreasing of the particle diameter. Moreover, a linear relationship exists between the eutectic temperature and the reciprocal of the particle diameter when the diameter is large enough (e.g., 5 nm). The model predictions correspond to the experimental observations.