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(Color online) (a) M-CNTs heterodimension junctions. Left panels: long and wet CNTs bundles are cohered with annealed nickel foil to form M-CNTs junctions after the deionized water is evaporated. Right panels: Photograph and the schematic illustration of the M-CNTs junction circuit. (b) MW-DW heterodimension junctions. Left panels: long DW CNTs bundles in deionized water are fetched with aligned MW CNTs bundles to form MW-DW junctions. Right panels: SEM image of MW-DW junctions and the schematic illustration of the MW-DW junction circuit. The MW CNTs and DW CNTs indicated by the white and black arrows, respectively.
(Color online) (a) M-CNTs junctions illuminated by the laser with . Left panels: photoinduced current as a function of the laser spot location for M-SW-M, M-DW-M, and M-MW-M junction circuits, respectively; Midpanels: the corresponding photoelectronic response for illuminating at contact ; Right panels: dependence of photoinduced current on the laser intensity for the indicated illuminating positions. (b) M-MW-DW-M junction circuit illuminated by the laser with . The mid and right panels are for the maximum current of the left panel whose position corresponds to the MW-DW junction interface.
(Color online) (a) Photograph of the photoelectron sensor. (b) SEM image of MW CNTs array. (c) Normalized laser intensity dependence of the current for , , and lasers irradiating on the silver paint film of the device. (d) The photoelectric response of the device illuminated by the laser with .
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