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

Lookup NU author(s): Matthias Batzill, Professor Ken Snowdon


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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 ∼20 nm in diameter. Some cleavage steps show preferential fluorine erosion, which leads to the formation of very long calcium nanowires of uniform width ∼15 nm parallel to the step edge. The observed island and wire morphology is explained by energy minimization of strained commensurate islands. © 2000 American Institute of Physics.

Publication metadata

Author(s): Batzill M, Snowdon KJ

Publication type: Article

Publication status: Published

Journal: Applied Physics Letters

Year: 2000

Volume: 77

Issue: 13

Pages: 1955-1957

ISSN (print): 0003-6951

ISSN (electronic): 1077-3118

Publisher: American Institute of Physics


DOI: 10.1063/1.1311949


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