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(a) TEM images of the tungsten oxide nanowire 2D networks and (b) branched 2D networks. (c) High resolution TEM image of the circled area in (b) and the ED patterns of the two branches.
(Color online) (a) XRD pattern of the tungsten oxide nanowire 2D networks; marks a shoulder to the (110) peak. (b) Simulated crystal structure of the tetragonal tungsten oxide in the plane.
Field emission properties of the 2D tungsten oxide networks and its corresponding FN plot (inset).
TEM images of 2D nanotube networks. (a) A single 2D network; (b) enlargement of the central area in (a). Arrows 1, 2, 3, and 4 refer to small nanotubes present at the junction area.
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