Size and segregation effects on the phase diagrams of nanoparticles of binary systems

The phase diagrams of small particles (with diameters in the nanometre range) are studied theoretically. In the limit where thermodynamical arguments remain valid, it is deduced that the phase diagram of small particles is a function of their size. This is discussed for the cases of eutectics and regular solutions. The effects of surface segregation are also treated and lead to further modifications of the phase diagrams.