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Phase coexistence in gallium nanoparticles controlled by electron excitation

Phase coexistence in gallium nanoparticles controlled by electron excitation
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 ?, ?, 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.
nanoparticles, structural transitions, optical properties
1550-7998
145702-[4pp]
Pochon, S.
8839cdca-fe45-4dee-b102-c75003565a84
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
Knize, R.J.
c23e88fc-4d0f-4a57-a439-d79722d89146
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Pochon, S.
8839cdca-fe45-4dee-b102-c75003565a84
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
Knize, R.J.
c23e88fc-4d0f-4a57-a439-d79722d89146
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Pochon, S., MacDonald, K.F., Knize, R.J. and Zheludev, N.I. (2004) Phase coexistence in gallium nanoparticles controlled by electron excitation. Physical Review D, 92 (14), 145702-[4pp]. (doi:10.1103/PhysRevLett.92.145702).

Record type: Article

Abstract

In gallium nanoparticles 100 nm in diameter grown on the tip of an optical fiber from an atomic beam we observed equilibrium coexistence of ?, ?, 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.

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Published date: 9 April 2004
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Keywords: nanoparticles, structural transitions, optical properties

Identifiers

Local EPrints ID: 27979
URI: http://eprints.soton.ac.uk/id/eprint/27979
DOI: doi:10.1103/PhysRevLett.92.145702
ISSN: 1550-7998
PURE UUID: 3e473e59-f398-4931-a09e-a06e5d1ad8bc
ORCID for K.F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 28 Apr 2006
Last modified: 16 Mar 2024 03:10

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Contributors

Author: S. Pochon
Author: K.F. MacDonald ORCID iD
Author: R.J. Knize
Author: N.I. Zheludev ORCID iD

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