fig4

Figure 4. X-ray photoelectron spectroscopy spectra of 0.55Bi0.5Na0.5TiO3-0.45(Sr0.7Bi0.2)TiO3 nanofibers: (A) survey spectra, (B) Bi,
Figure 4. X-ray photoelectron spectroscopy spectra of 0.55Bi0.5Na0.5TiO3-0.45(Sr0.7Bi0.2)TiO3 nanofibers: (A) survey spectra, (B) Bi,
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