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FESEM images of (a) and (b) a CuO NW array and (c) and (d) a CuO granular film with different magnifications. XPS spectra of the CuO NW array and CuO granular film marked as I and II, respectively: (e) Survey, (f) Cu 2p, and (g) O 1s.
DWCNT film/CuO NW array heterodimensional contacts: (a) Schematic diagram. (b) I-V characteristics in the dark within the bias voltage range −1.0 V to 1.0 V. [(c), (e), and (g)] I-V characteristics and [(d), (f), and (h)] photoresponses under illumination with (c) and (d) 405, (e) and (f) 532, and (g) and (h) 1064 nm lasers.
Energy band diagram between the CNT and the CuO. Left: before contact. Right: after contact.
DWCNT film/CuO granular film heterodimensional contacts: (a) I-V characteristics in the dark within the bias voltage range −1.0 V to 1.0 V. Inset: schematic diagram. Photoresponses under illumination with (b) 405, (c) 532, and (d) 1064 nm lasers.
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