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Optical micrograph of the patterned sample. The inset is an enlarged view of the electrode.
(a) Plan view SEM image of the as-synthesized ZnO nanowires between the electrodes. (b) HRTEM micrograph of a ZnO nanowire indicating that it is a single crystal. The inset is a bright-field TEM micrograph of a typical ZnO nanowire. (c) Room temperature PL spectrum using an excited HeCd laser .
Schematic diagram of the photoresponse measurement setup.
(a) Time dependent photocurrent response to input UV illumination (normalized) in air changing with a period of . The inset shows the corresponding time dependent photocurrent response in vacuum. (b) characteristics of the photodetector with and without UV illumination.
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