Nanoparticles nanoparticle 64 chemistry 41 Article 30 Synthesis (chemical) 27 human 27 Humans 25 Animals 24 animal 24 controlled study 24 drug delivery system 20 Nanofluidics 19 nonhuman 19 particle size 18 Fourier transform infrared spectroscopy 15 Mice 15 Scanning electron microscopy 15 mouse 15 procedures 15 Chitosan 14 Diseases 14 Particle size 13 X ray diffraction 13 metabolism 13 Drug Delivery Systems 12 Nanocomposites 12 Particle Size 12 Silica 12 Targeted drug delivery 12 animal experiment 12