Figure 3.

The phase structure and composition analysis of the Ni-doped TiO2 nanotubes. (a) EDX analysis pattern of the as-annealed samples. (b) XRD pattern of the as-anodized samples and as-annealed samples.

Li et al. Nanoscale Research Letters 2014 9:118   doi:10.1186/1556-276X-9-118
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