Figure 1.

a The geometrical configuration of ion-beams sputtering and Fe doping process. b XRD results of as-synthesized sample. c SEM images of Zn0.989Fe0.011O NDs. d TEM image of a single Zn0.989Fe0.011O nanoneedle. e High-resolution TEM image of the nanoneedle and f the corresponding selected area electron diffraction pattern

Yang et al. Nanoscale Research Letters 2009 5:247-251   doi:10.1007/s11671-009-9473-9