The Influence of Shape and Atomicity on the Thermodynamics of Nanocrystal In
Based on the theory of solid physics, we have obtained the relation of the surface and inner atomicity of nanocrystal and the shape, and the formula of Debye temperature and thermal capacity. Taking indium nanocrystal as an example, we have studied the influence of the shape and atomicity on the Debye temperature and thermal capacity of nanocrystal. As a result, the Debye temperature of nanocrystal is related to the atomic reciprocity potential, structure, shape and atomicity; the variation curve the Debye temperature of nanocrystal has the same variation trend as the lumpish crystal, but the minimum Debye temperature is lower than that of the lumpish crystal; the shape has a larger influence on the surface thermal capacity, while the inner thermal capacity has nothing to do with its shape. In all shapes of nanocrystal, the cubic thermal capacity is maximum; there will be the so-called double-state phenomenon. Namely, both the flat and thin-pole right-angle nanocrystal have the same atomic coordination number and thermodynamic properties. While the right-angle nanocrystal is most stable, the atomicity may only has some special numbers ( named magic number）; the magic numbers of the simple, body-centered, face-centerd cubic and diamond structures of nanocrystal are respectively 8、10、13 and 4, and the universal one is N*= INTN3po/α，and Npo is positive integer more than 2.
Indium nanocrystal Shape and atomicity Thermal capacity Double-state phenomenon Temperature
吴强 郑瑞伦 叶冬五
重庆文理学院物理与信息工程系,重庆 永川 402160 重庆文理学院 基础学院,重庆 永川 402160
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）