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SEM images of small ZnO nanowires. The inset is a high-magnification SEM image of a single nanowire, showing that a “droplet” is at the end of the nanowire.
(a) Typical SEM image of small ZnO tripodlike arms at the end of nanowires. (b) High-magnification top-viewed SEM image of a single nanostructure, and (c) the corresponding TEM image.
(a) TEM image of the junction part. (b) HRTEM image of the part A in (a). The inset is the corresponding 2D FFT spectrum. (c) HRTEM image of the part J in (a). The inset is the corresponding 2D FFT spectrum.
(a) Raman spectrum and (b) PL spectrum of the nanostructures at room temperature.
Assignments of the peaks in the Raman spectrum.
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