Phase coexistence in gallium nanoparticles controlled by electron excitation

In gallium nanoparticles 100 nm in diameter grown on the tip of an optical fiber from an atomic beam we observed equilibrium coexistence of gamma, beta, and liquid structural phases that can be controlled by e-beam excitation in a highly reversible and reproducible fashion. With 2 keV electrons only...

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Bibliographic Details
Published in:Physical review letters 2004-04, Vol.92 (14), p.145702-145702, Article 145702
Main Authors: Pochon, S, MacDonald, K F, Knize, R J, Zheludev, N I
Format: Article
Language:English
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Summary:In gallium nanoparticles 100 nm in diameter grown on the tip of an optical fiber from an atomic beam we observed equilibrium coexistence of gamma, beta, and liquid structural phases that can be controlled by e-beam excitation in a highly reversible and reproducible fashion. With 2 keV electrons only 1 pJ of excitation energy per nanoparticle is needed to exercise control, with the equilibrium phase achieved in less than a few tenths of a microsecond. The transformations between coexisting phases are accompanied by a continuous change in the nanoparticle film's reflectivity.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.145702