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Raman scattering by thin film nanomosaic rutile
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Image of FIG. 1.
FIG. 1.

Raman shift signal intensity vs wave number for (a) single layer films and (b) nanolaminates on Au-coated glass. (c) Annealed companion films to (a) on fused . Film A is included for comparison. Peaks are attributed to rutile modes: (1) , (2) , (3) , and (4) .

Image of FIG. 2.
FIG. 2.

(a) Rutile unit cell with Ti atoms at (small white circle) and (0,0,0) and equivalent corner positions (small black circles), equatorial O atoms, (labeled “E”) at positions and apical O atoms (labeled “A”) at with . (b) Raman-active and modes of rutile in a [001] projection.

Image of FIG. 3.
FIG. 3.

Octahedral coordination across a {011} growth fault on the Ti sublattice leaving the O sublattice unfaulted. Ion sites are labeled as in Fig. 2(a) . The zigzagged dotted line indicates edge-sharing octahedra at the fault.

Image of FIG. 4.
FIG. 4.

Rutile slab one unit thick along the axis growing in the direction. A Ti interstitial has attached at O layer 4, forming apical bonds with and and equatorial bonds with and from layer 3. O atoms and (at allowed sites on the O sublattice) bond to the interstitial and complete the faulted octahedron. The arrows indicate O ion motion in the mode. Vacant Ti sites 4 and 5 are indicated by squares. The dashed lines aid reader with site placement.


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Table I.

Architecture of single layer and nanolaminate films.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Raman scattering by thin film nanomosaic rutile TiO2