a1 Ili Pedagogical Institute, Ili, Xin Jiang, People’s Republic of China
a2 Condensed Matter Physics, University of Mons-Hainaut, B-7000 Mons, Belgium
Systems with typical dimensions in the range of 1–100 nm are in an intermediate state between solid and molecular. Such systems are characterized by the fact that the ratio of the number of surface to volume atoms is not small. This is known to lead to size and shape effects on their cohesive properties. In this work, the phase diagram of nanowires was studied in the framework of classical thermodynamics. The roles of the size, shape, and surface tensions were emphasized. The melting temperatures of nanowires of 21 elements were evaluated theoretically. In the case of binary systems, it was shown that the experimental or theoretical knowledge of the size-dependent phase diagrams of a given binary system allows the evaluation of the one of nanowires. The procedure is described in this paper.
(Received March 27 2006)
(Accepted June 01 2006)
(Online publication March 03 2011)