At low Pr3+ content, microrods arranging in group trend to π-configuration, in which Raman spectra, peak 2 is stronger than peak 3, and only peak 1–3 were detected.
At low Pr3+ content, microrods arranging in group trend to π-configuration, in which Raman spectra, peak 2 is stronger than peak 3, and only peak 1–3 were detected.