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Representative scanning electron microscopy (SEM) images of well-aligned vanadium pentoxide nanowires.
(Color online) Electrical responses of nanowires while the chamber originally filled with air is evacuated from to . (a) Conductance variation as a function of the pressure. (b) Current-voltage characteristics of nanowires when the pressure is , and .
(Color online) (a) Conductance variation of the nanowires while the chamber originally filled with helium gas is evacuated from to . (b) Conductance responses to the repeated changing of the pressure from to . I is a stable state when the chamber pressure is , and II is stable when .
(Color online) (a) The flow-rate-dependent conductance variations of the nanowires when the carrier gas with flow rate of was used. (b) The conductance responses of the nanowires to the increase of the flow rate of the helium gas without carrier gas. (c) Conductance variation as a function of the flow rate of the helium gas for two different conditions, with and without carrier gas.
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