Journal
NANO LETTERS
Volume 4, Issue 7, Pages 1197-1201Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0495763
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Imperfect oriented attachment of nanoparticles over specific surfaces is rationalized to cause accretion and defects for the rutile condensates. Analytical electron microscopy indicates that rutile nanoparticles prepared by Nd:YAG laser ablation on Ti targets have well-developed {110} and {011} surfaces with steps. These surfaces are beneficial to {similar to110} and {similar to011} vicinal attachment, causing, respectively, edge dislocations and planar defects, i.e., fault and twin for rutile crystal. The {011}-interface relaxation, by shearing along <011> directions, accounts for a rather high density of edge dislocations near the planar defects thus formed. Brownian motion may proceed above a critical temperature for anchorage release at the interface of imperfect attached nanoparticles until an epitaxial relationship is reached.
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