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Role of thermodynamics in the shape transformation of embedded metal nanoparticles induced by swift heavy-ion irradiation

Ridgway, Mark C; Giulian, Raquel; Sprouster, David; Kluth, Patrick; Araujo, Leandro; Llewellyn, David; Byrne, Aidan; Kremer, F.; Fichtner, P; Rizza, G; Amekura, H; Toulemonde, Marcel

Description

Swift heavy-ion irradiation of elemental metal nanoparticles (NPs) embedded in amorphous SiO2 induces a spherical to rodlike shape transformation with the direction of NP elongation aligned to that of the incident ion. Large, once-spherical NPs become progressively more rodlike while small NPs below a critical diameter do not elongate but dissolve in the matrix. We examine this shape transformation for ten metals under a common irradiation condition to achieve mechanistic insight into the...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
URI: http://hdl.handle.net/1885/66983
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.106.095505

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