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Solid state self-assembly of nanocheckerboards
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) TEM images of cooled at room . (a) Coexisting nanoscale herringbone and checkerboard domains. The inset shows the expanded view of the herringbone domains (circled region). (b) Expanded view of the checkerboard domain. The white arrows represent the crystallographic cubic axes. (c) Diffraction pattern of the herringbone domains (circled region), showing the diffuse streaks and superlattice spots. The red arrow points to the first order superlattice peak: the position corresponds to a new structural modulation with the periodicity. Indices of the cubic spinel structure were used for diffraction peaks.

Image of FIG. 2.
FIG. 2.

(Color online) [(a) and (b)], TEM images with the relative sample orientation of . The checkerboard domain denoted as “A” in the [100] incidence image displays a herringbone pattern for the [010] incidence, demonstrating that the checkerboard and herringbone images are different angular views of the same nanoscale object. The white arrows are used for the crystallographic cubic axes. (c) X-ray diffraction patterns of for , 1.0, and 1.7 with different cooling rates. The subscript and denote the cubic and tetragonal indices, respectively. The arrows depict the tetragonal splitting.

Image of FIG. 3.
FIG. 3.

(Color online) (a), High-resolution TEM image of the checkerboard domain at room . The checkerboard domain consists of four different domains, denoted as , , , and . The and domains are cubic and the and domains appear to be orthorhombic. The inset shows a diffraction pattern of the checkerboard domain. (b) Dark field image taken by using one of the split peaks around the (800) position, denoted as . (c) Schematic view of how different structural domains form a checkerboard domain.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Solid state self-assembly of nanocheckerboards