Figure 3.

CL spectra of nanorods and nanotubes without and with NiO buffer layer. ZnO nanorods (a) on GaN and (b) on NiO thin-layer-coated GaN. ZnO nanotubes (c) on GaN and (d) on NiO thin-layer-coated on GaN.

Abbasi et al. Nanoscale Research Letters 2013 8:320   doi:10.1186/1556-276X-8-320
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