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. 2019 Sep 6;9(9):1274. doi: 10.3390/nano9091274

Figure 4.

Figure 4

(a) Photographs of anti-stokes luminescence under 980-nm laser excitation and stokes luminescence of NYFT@MOFY-1 nanocomposites 290-nm light excitation; (b) anti-stokes emission spectra of NaYF4:Tm3+/Yb3+, NYFT@MOFY-10, NYFT@MOFY-5, and NYFT@MOFY-1 under 980-nm excitation; (c) stokes emission spectra of MOF-Y, NYFT@MOFY-1, NYFT@MOFY-5, and NYFT@MOFY-10 excited at 290 nm; and (d) stokes excitation spectra of MOF-Y, NYFT@MOFY-1, NYFT@MOFY-5, and NYFT@MOFY-10 monitored at 618 nm.