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(a) SEM image of the ZnO nanostructures grown on Si substrate. (b) EDX result of nanocomb after Ti-PIII.
[(a) and (b)] Typical low-magnification TEM images of ZnO comb fingers after 0 and Ti-PIII, respectively. Insets are the corresponding SAED pattern. (c) HRTEM images of ZnO comb fingers before PIII treatment. [(d) and (e)] HRTEM images of ZnO comb fingers taken from the selected area in (a) and (b), respectively.
(Color online) Normalized PL spectra of ZnO nanocombs before and after 0 and Ti-PIII treatments. The curves are shifted in intensity for a better comparison. The inset compares room-temperature PL spectra before and after Ti-PIII.
(Color online) Temperature-dependent NBE recombination for (a) as-grown and (b) Ti-PIII treated ZnO nanocombs showing the FX and its LO-phonon replicas. The vertical lines indicate the maxima of the FX, FX-1LO, and FX-2LO in (a) at . The curves are shifted in intensity for a better comparison.
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