Figure 1.

Typical SEM images. (a) Undoped, (b) 0.5%, (c) 1.0%, (d) 2.5%, and (e) 5.0% (nominal) Eu-doped TiO2 nanoparticles. The insets show magnified images of some particles for each sample.

Pal et al. Nanoscale Research Letters 2012 7:1   doi:10.1186/1556-276X-7-1
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