FEIG tungsten nanowire grown at emission current for a period of .
characteristic of FEIG tungsten nanowire. The inset shows the corresponding FN plot and ideal FN relationship.
Emission current from fresh FEIG tungsten nanowire. The anode is biased at . Current sampling .
Current stability before and after flash clean. The anode is biased at constant voltage. Current sampling .
Emission characteristics at intermediate and high current levels. Current sampling .
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.
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.
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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