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Selective growth of tungsten oxide nanowires via a vapor-solid process
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic of the quartz tube reaction chamber enclosed in the furnace showing relative positions of the tungsten powders and the substrates (not to scale). (b) Temperature profiles along the substrates from upstream to downstream at different source heating temperatures of 570, 650, and .

Image of FIG. 2.
FIG. 2.

(a) SEM image of nanowires on with a close-up view in the inset, (b) XRD spectrum of nanowire on with an inset showing detail peaks of from 20° to 28°, (c) SEM image of tungsten oxide nanowires grown on a tungsten-coated TEM grid with a close-up view in the inset, and (d) TEM high resolution image of a single tungsten oxide nanowire.

Image of FIG. 3.
FIG. 3.

Selective growth of nanowires: (a) on patterned with a shadow mask, (b) and (c) on with (b) transverse tungsten nanogratings and (c) longitudinal tungsten nanogratings, and (d) schematic drawing of the mechanism for the selective growth. The inset is a close-up view of the nanowires.

Image of FIG. 4.
FIG. 4.

SEM images of tungsten powders after heated with of (a) , (b) , and (c) .

Image of FIG. 5.
FIG. 5.

SEM images of morphological evolution of tungsten oxide on substrates with different heating conditions. Top: with (a) , (b) , and (c) ; middle: with (d) , (e) , and (f) ; bottom: with (g) , (h) , and (i) .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Selective growth of tungsten oxide nanowires via a vapor-solid process