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(a) and (b) Low magnified SEM images of as-synthesized product, showing ZnO nanopushpins in large area. (c) High magnified SEM image of the ZnO nanopushpins. (d) TEM image of a single nanopushpin. The inset is the SAED pattern.
(a) and (b) Low magnified SEM images of the as-grown product showing the highly aligned ZnO nanotubes in large quantities. (c) High magnified SEM image of the ZnO nanotubes. (d) TEM image of a single ZnO nanotube, whose top was broken. The corresponding SAED pattern is shown in the inset.
(a) The room-temperature CL spectrum (300–700 nm) of the ZnO nanotubes. (b) The CL image of the nanotubes at panchromatic mode. (c) and (d) CL images corresponding to 504 and 383 nm, respectively.
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