Selective enhancement of green upconversion luminescence of Er–Yb: NaYF4 by surface plasmon resonance of W18O49 nanoflowers and applications in temperature sensing

Selective enhancement of green upconversion luminescence of Er–Yb: NaYF₄ by surface plasmon resonance of W₁₈O₄₉ nanoflowers and applications in temperature sensing

Li Ang^{1, 2, 3}, Wu Jin-Lei^{2, 3}, Xu Xue-Song^{1, 2}, Liu Yang³, Bao Ya-Nan^{2, 3}, Dong Bin^{3, †}

(color online) SEM images of (a) W₁₈O₄₉ nanoflowers, (b) Er–Yb: NaYF₄ particles, (c) Er–Yb: NaYF₄/W₁₈O₄₉ nanoflowers particles, and (d) Er–Yb: NaYF₄/W₁₈O₄₉ nanoflowers particles; (e) XRD patterns of Er–Yb: NaYF₄/W₁₈O₄₉ and Er–Yb: NaYF₄/WO₃ nanoflowers particles; and (f) absorption spectra of W₁₈O₄₉ and WO₃ nanoflowers.