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Phase stabilization of nanostructures by epitaxial growth onto single crystal or substrates
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View: Figures


Image of FIG. 1.
FIG. 1.

(001) projections of the unit cells of (a) and (b) cubic shown at room temperature and the same magnification. The indicated 45° relative rotation of the two lattices about their [001] axes results in an in-plane room temperature misfit of the two oxygen sublattices of only 0.15%, thus providing a driving force for stabilization of the -phase over a wide temperature range. The black lines denote the [100] traces of each unit cell.

Image of FIG. 2.
FIG. 2.

SEM [(a) and (b)] and AFM [(c) and (d)] images of nanostructures on (001) . [(a) and (c)] On low miscut , nanoislands form with {101} side-wall facets and coalesce along the substrate step edges. [(b) and (d)] On with 1° miscut along the [100], nanowires form along the step edges. For the AFM images, the height scale is logarithmic, with a range of 70 nm for (c) and 140 nm for (d). Whiter hues indicate greater height.

Image of FIG. 3.
FIG. 3.

RSMs for nanostructures grown on low miscut perovskite substrates. All RSMs are centered along the perovskite CTR. (a) on (001) at and , (b) on at and , and (c) /strain-relaxed on (001) at and . Redder (darker) hues indicate higher intensity (log scale).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phase stabilization of δ-Bi2O3 nanostructures by epitaxial growth onto single crystal SrTiO3 or DyScO3 substrates