Shape transition of calcium islands formed by electron-stimulated desorption of fluorine from a CaF2(111) surface

被引：9

作者：

Batzill, M ^{[1
]}

Snowdon, KJ ^{[1
]}

机构：

[1] Univ Newcastle Upon Tyne, Ctr Nanoscale Sci & Technol, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 13期

关键词：

D O I：

10.1063/1.1311949

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Extremely low-energy electrons emitted from a heated filament have been used to deplete fluorine from a cleaved CaF2(111) surface. Calcium left behind on the surface reorganizes itself in islands. A shape transition for the islands from a compact shape to an elongated shape has been observed for islands larger than similar to 20 nm in diameter. Some cleavage steps show preferential fluorine erosion, which leads to the formation of very long calcium nanowires of uniform width similar to 15 nm parallel to the step edge. The observed island and wire morphology is explained by energy minimization of strained commensurate islands. (C) 2000 American Institute of Physics. [S0003-6951(00)00439-3].

引用

页码：1955 / 1957

页数：3

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