Stress-Induced Structural Phase Transition in Polystyrene/NaYF₄: Eu³⁺ Photoluminescent Electrospun Nanofibers

Figure 2

X-ray diffractogram of PS composite nanofibers. PS (green triangle), α-NaYF₄: Eu³⁺ (blue circle), β-NaYF₄: Eu³⁺ (red square), and Al-foil (violet pentagon) peaks are shown with different asterisks.