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Field-emission properties of ultrathin tungsten nanowire
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View: Figures


Image of FIG. 1.
FIG. 1.

FEIG tungsten nanowire grown at emission current for a period of .

Image of FIG. 2.
FIG. 2.

characteristic of FEIG tungsten nanowire. The inset shows the corresponding FN plot and ideal FN relationship.

Image of FIG. 3.
FIG. 3.

Emission current from fresh FEIG tungsten nanowire. The anode is biased at . Current sampling .

Image of FIG. 4.
FIG. 4.

Current stability before and after flash clean. The anode is biased at constant voltage. Current sampling .

Image of FIG. 5.
FIG. 5.

Emission characteristics at intermediate and high current levels. Current sampling .

Image of FIG. 6.
FIG. 6.

FEM patterns (a) immediately after flash clean and [(b)–(d)] adsorbate-covered tip after a period of emission. Dotted circle indicates the overall extent of the field-emission pattern.

Image of FIG. 7.
FIG. 7.

HRTEM image of FEIG W nanowire tip after field emission at for . The thick electron-beam induced carbon contamination coated during TEM viewing helped to reduce thermal vibration.

Image of FIG. 8.
FIG. 8.

SEM images of FEIG W nanowire after each voltage ramp to the respective current compliance. A line matching the length of nanowire is drawn to provide a visual aid to indicate the length. Current compliance , turn-on voltage of , and the respective nanowire length are also indicated. Maximum current achievable was at the highest voltage compliance of .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Field-emission properties of ultrathin 5nm tungsten nanowire