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Stable field emission from tetrapod-like ZnO nanostructures
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View: Figures


Image of FIG. 1.
FIG. 1.

Low-magnification SEM image of the as-grown tetrapod-like ZnO nanostructures.

Image of FIG. 2.
FIG. 2.

Typical TEM image of a single leg of individual tetrapod-like ZnO nanostructures: (a) top part of the leg, scale bar: , (b) side part of the leg. The high-resolution TEM image clearly indicates the single crystalline structures.

Image of FIG. 3.
FIG. 3.

SEM image of the tetrapod-like ZnO nanostructures painted on a highly doped Si substrate covered with of Au. The inset shows one individual tetrapod-like ZnO nanostructure.

Image of FIG. 4.
FIG. 4.

(a) Field emission curves measured at different distances between the substrate and the anode (, 200, 300, 400, 600, and ). (b) Corresponding FN plots of the emission current in (a).

Image of FIG. 5.
FIG. 5.

Stability of the emission current. The voltage was increased from to within and then fixed at . After , the current was kept almost constant for three days. The inset shows fluctuations of the emission current.

Image of FIG. 6.
FIG. 6.

Current over time recorded for the tetrapod-like ZnO nanostructures directly painted on a highly doped Si substrate.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Stable field emission from tetrapod-like ZnO nanostructures