Fig. 2: Characterization of microspheres. | npj Regenerative Medicine

Fig. 2: Characterization of microspheres.

From: Multifunctional injectable microspheres for osteoarthritis therapy via spatiotemporally modulating macrophage polarization and inflammation

Fig. 2

a Scheme of synthesis process of double-layer microspheres. Scanning electron micrographs of the double-layered microspheres prepared by the double-emulsification method twice, and the single-layered microspheres formed by the first double-emulsification and the finally prepared double-layered microspheres. Scale bar, 2.5 μm. b Fluorescence microscope images of single and double-layered microspheres. Scale bar, 10 μm. c–e The XRD spectra, TGA curves and the FTIR spectra of the two carrier materials of microspheres, PXB, the physical mixture of blank double-layer microspheres and PXB powder, and the double-layer microspheres co-loading two drugs.

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