Fig. 2: Characterization of chemical properties of NPs. | Communications Biology

Fig. 2: Characterization of chemical properties of NPs.

From: Function-adaptive clustered nanoparticles reverse Streptococcus mutans dental biofilm and maintain microbiota balance

Fig. 2

a Fluorescence emission spectra of the NPs with and without polymer wrapping with \({\lambda }_{{\mathrm{excitation}}}=320\,{\mathrm{nm}}\). The signal from the CDots is preserved and enhanced when wrapped in the polymer shell; b 1H NMR spectra of (i) CHX, (ii) CHX NPs, (iii) PR4+ compound, and (iv) CHX PR4+ NPs and the corresponding assignments; c 31P NMR spectra comparing the phosphonium compound and CHX PR4+ NPs; d XPS spectra in the P-binding region of (i) phosphonium compound (PR4+) and (ii) CHX PR4+ NPs, which showed similar peaks; e XPS spectra in the Cl-binding region for (i) chlorhexidine (CHX) and (ii) CHX PR4+ NPs, which showed noticeable changes in the chemical binding.

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