In situ controlled modification of the helium density in single helium-filled nanobubbles

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DOIResolve DOI: http://doi.org/10.1063/1.4869213
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TypeArticle
Journal titleJournal of Applied Physics
ISSN0021-8979
Volume115
Issue12
Article number123508
SubjectElectron beams; Probes; Transmission electron microscopy; Ballistic collisions; Controlled modification; Electron-beam parameters; Experimental conditions; Irradiation sources; Multifunctional probes; Physical mechanism; Scanning transmission electron microscopes; Helium
AbstractWe demonstrate that the helium density and corresponding pressure can be modified in single nano-scale bubbles embedded in semiconductors by using the electron beam of a scanning transmission electron microscope as a multifunctional probe: the measurement probe for imaging and chemical analysis and the irradiation source to modify concomitantly the pressure in a controllable way by fine tuning of the electron beam parameters. The control of the detrapping rate is achieved by varying the experimental conditions. The underlying physical mechanisms are discussed; our experimental observations suggest that the helium detrapping from bubbles could be interpreted in terms of direct ballistic collisions, leading to the ejection of the helium atoms from the bubble.
Publication date
PublisherAIP Publishing
LanguageEnglish
AffiliationNational Research Council Canada; Energy, Mining and Environment
Peer reviewedYes
NPARC number21272687
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Record identifier51105613-e76b-4296-9b56-8f78f54da01d
Record created2014-12-03
Record modified2017-03-23
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