Scheme 1.
Illustration of multifunctional melanin-like poly(L-DOPA) nanoparticles (MNPs) utilized in the combination regimen of photothermal, photodynamic, chemotherapeutic, and magnetic resonance imaging (MRI)-guided targeted cancer therapy. (A) KMnO4 oxidative synthesis of MNPs and anticancer drug loading. (B) Multi-stimuli responsive theragnostic functions of MNPs.