Tin clusters that do not melt: Calorimetry measurements up to 650 K

被引：39

作者：

Breaux, GA ^{[1
]}

Neal, CM ^{[1
]}

Cao, BP ^{[1
]}

Jarrold, MF ^{[1
]}

机构：

[1] Indiana Univ, Dept Chem, Bloomington, IN 47404 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.71.073410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent theoretical studies [K. Joshi, D. G. Kanhere, and S. A. Blundell, Phys. Rev. B 67, 235413 (2003)] predict that Sn-20 melts at around 1200 K. We have performed calorimetry measurements on unsupported Sn-18(+), Sn-19(+), Sn-20(+), and Sn-21(+) in an effort to test this prediction. We find that these tin clusters disappear well below their predicted melting temperature due to dissociation. Calorimetry measurements performed up to around 650 K show some small features (which may be due to localized structural changes) but no clear melting transitions. Hence, tin clusters in this size regime do not melt-they sublime.

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页数：4

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