Fig. 2From: Dual Antibacterial Effect of In Situ Electrospun Curcumin Composite Nanofibers to Sterilize Drug-Resistant Bacteriaa Fluorescence spectrum of core–shell NaYF4:Yb/Tm@NaYF4:Nd excited by 808 nm, b fluorescence spectrum of UCNPs and UV–vis absorption spectrum of curcumin, c FTIR spectra of UCNPs@Curcumin, curcumin and PEI, d time-resolved fluorescence spectra of UCNPs and UCNPs@CurcuminBack to article page