Melting point oscillation of a solid over the whole range of sizes

Chang Q Sun, C M Li, H L Bai, E Y Jiang
2005 Nanotechnology  
It is intriguing that a solid containing ∼10 1 atoms of Ga or IV-A elements (C, Si, Ge, Sn, and Pb) melts at temperatures that are higher than the melting point of the corresponding bulk solid (T m,b ) though the T m of a solid in the 10 0-2 nm size range drops universally with the sample size. Consistent insight into the phenomenon of T m oscillation (suppression followed by elevation as the solid size is reduced from bulk to subnanometre size) over the whole range of sizes remains a
more » ... challenge. Here we show that the T m oscillation arises from the joint effect of bond order loss and its consequence on bond strength gain of small clusters in particular for Ga and atoms of the IV-A elements.
doi:10.1088/0957-4484/16/8/051 fatcat:h2e3dntovnbtlitupjrmr7ggp4