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Title: Swift heavy ion irradiation of Pt nanocrystals: I. shape transformation and dissolution

We report on the effects of swift heavy ion irradiation of embedded Pt nanocrystals (NCs), which change from spheres to prolate spheroids to rods upon irradiation. Using a broad range of ion irradiation energies and NC mean sizes we demonstrate that the elongation and dissolution processes are energy and size dependent, attaining comparable levels of shape transformation and dissolution upon a given energy density deposited in the matrix. The NC shape transformation remains operative despite discontinuous ion tracks in the matrix and exhibits a constant threshold size for elongation. In contrast, for ion irradiations in which the ion tracks are continuous, the threshold size for elongation is clearly energy dependent.
Authors:
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  1. (ANU)
Publication Date:
OSTI Identifier:
1028514
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Phys. D; Journal Volume: 44; Journal Issue: (15) ; 03, 2011
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
FOREIGN
Country of Publication:
United States
Language:
ENGLISH
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; DISSOLUTION; ELONGATION; ENERGY DENSITY; HEAVY IONS; IRRADIATION; SHAPE; SPHEROIDS; TRANSFORMATIONS