Figure 8.

(a) Gross appearance and SEM images of Gel scaffold and Gel/Fe₃O₄ composite scaffolds prepared with different concentration of Fe₃O₄ nanoparticles. (b) UV-Vis absorption spectra of Gel scaffold and Gel/Fe₃O₄ composite scaffolds. (c) Relation between temperature and irradiation time of Gel scaffold and Gel/Fe₃O₄ composite scaffolds under NIR laser irradiation. (d) Live/dead staining of HeLa cells in Gel scaffold and Gel/Fe₃O₄ composite scaffolds without or with NIR laser irradiation for different cycles. Reproduced with permission [157]. (e) Schematic illustration of GdPO₄/CS/Fe₃O₄ scaffolds for NIR-induced photonic hyperthermia and enhanced bone tissue regeneration. (f) Micro-CT images of calvarial defect repair model at 3 months after surgery for the control, CS, GdPO₄/CS, GdPO₄/CS/Fe₃O₄ groups. (g) Newly formed bones were detected in the GdPO₄/CS/Fe₃O₄ by H&E staining and Masson’s trichrome staining. Reproduced with permission [158]