Figure 1.

X-ray diffraction of the ZnO films consisting of only nanoparticles or nanoporous spheres. The peak intensities and positions from the hexagonal ZnO (JCPDS #36-1451) are shown as solid lines.

Kim et al. Nanoscale Research Letters 2014 9:295   doi:10.1186/1556-276X-9-295
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