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Electron microscopic studies of ZnO NWs: SEM image of (a) typical ZnO NW forest (inset shows ZnO layer formed on the surface of Zn wire at 1023 K) and (b) NWs up to long. [(c) and (d)] High resolution TEM images of ZnO NWs, insets are corresponding electron diffraction patterns.
(a) Raman spectrum of ZnO NWs grown at 773 K; (b) Room temperature PL spectra of ZnO nanowires. Inset shows low temperature PL spectrum of ZnO NWs grown at 773 K; (c) growth rate dependence on the process temperature and SEM images of ZnO NWs at indicated temperatures (scale bar 500 nm).
Kinetic data of ZnO NW growth: (a) growth rate dependence on time (s) in a double logarithmic scale; (b) kinetic region (673–803 K) data of the growth rate in the Arrhenius coordinates; (c) schematics of ZnO NW growth mechanism.
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