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. 2020 Jun 26;9(6):1563. doi: 10.3390/cells9061563

Figure 1.

Figure 1

(A) Polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS) spectrum of gold substrates functionalized with hyaluronic acid and chitosan. The spectrum for the uncoated substrate was used as the baseline. (B) Assignment of the main bands in the PM-IRRAS spectrum.