Fig. 1From: Methotrexate-loaded multifunctional nanoparticles with near-infrared irradiation for the treatment of rheumatoid arthritisFabrication and characteristics of MTX-loaded MNPs. a Schematic fabrication process of MTX-loaded MNPs. b TEM images of 100–115-nm MNPs with Au half-shell (left upper corner) and NIR absorption spectrum of the MTX-loaded MNPsBack to article page