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. 2019 Feb 13;4(2):3169–3177. doi: 10.1021/acsomega.8b02416

Figure 2.

Figure 2

FTIR spectra of (a) pure 10-UDA- and (b) 10-UDA-capped Yb3+/Er3+-doped NaYF4 NPs. The inset shows the expanded view of the C=C–H bending region along with fwhm of the corresponding peaks.