“…Various nanoparticles since then were designed and developed, including poly(ethylene oxide)-poly(L-lactic acid)/poly(b-benzyl-L-aspartate), poly(lactideco-glycolide)-[(propylene oxide)-poly(ethylene oxide)], polyphosphazene derivatives, poly(ethylene glycol)-coated nanospheres, azidothymidin (AZT)/dideoxycytidine (ddc) nanoparticles, poly (isobutylcynoacrylate) nanocapsules, poly(g-benzyl-L-glutamate)/poly(ethylene oxide), chitosan-poly(ethylene oxide) nanoparticles, methotrexate-o-carboxymethylate chitosan, solid lipid nanoparticles (SLNs), and so on (Blasi et al 2009;Caruso et al 2010;Chekhonin et al 2009;Fonseca et al 2009;Gilmore et al 2008;Graf et al 2009;Huynh et al 2009;Jatariu et al 2009;Kaur et al 2008;Khalil and Mainardes 2009;Ljubimova et al 2008;Mistry et al 2009b;Modi et al 2010;Namdeo et al 2008;Shilpi et al 2007;Tosi et al 2008;Wong et al 2010). Further to these polymer nanoparticles, there are metal-based, lipid-based, and biological nanoparticles.…”