(A) Schematics of WBPLP-MNPs and BPLP-MNPs showing formulation process. TEM image of (B) WBPLP-MNPs (avg. size 220 nm), (C) BPLP-MNPs (avg. size 212 nm), and (D) bare MNPs (avg. size 10 nm). (E) FTIR spectra of (1) iron oxide nanoparticles, (2) WBPLP, (3) BPLP, (4) WBPLP-MNPs, and (5) BPLP-MNPs. (F) Degradation profiles of WBPLP and BPLP coatings on MNPs showing complete degradation in 3 weeks.