Fig. 2From: MXenes-integrated microneedle combined with asiaticoside to penetrate the cuticle for treatment of diabetic foot ulcerFluorescent assay for the insertion depth of MN. A Schematic illustration of MN loaded with ICG fluorescent assay and insertion of it. B Picture of MN inserted into pig skin. C Top-down photographic images of an ICG loaded MN. D–F The top-down and side fluorescent images of an ICG loaded MNBack to article page