Fig. 11From: Progressing nanotechnology to improve targeted cancer treatment: overcoming hurdles in its clinical implementationThe co-assembly of a drug and a photosensitizer to improve tumor size imaging during treatment. A A diagram illustrating the creation of carrier-free nanoparticles (NPs) through the co-assembly of DOX and Ce6. B In vivo fluorescence images of free Ce6 solution and Dox/Ce6 nanoparticles (NPs) are presented. The black circles indicate the tumor tissue. C Representative ex vivo fluorescence images of the tumor and organs from Balb/c nude mice xenografted with MCF-7 tumor, 24Â h after injection, are displayed. Reprint from [180] with a permission from Springer NatureBack to article page