Figure 5.

Raman spectra of the undoped and Eu-doped TiO2 nanoparticles. Peak broadening and red shift of the Raman-active mode at 144 cm-1 on the increasing dopant content are shown as inset.

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