“…These strategies comprise coating of nanoparticles with Tween 80 (Gelperina et al, 2002), PEG (polyethylene glycol) (Tang et al, 2007), PEO (polyethylene oxide) (Soppimath et al, 2001), poloxamers and poloxamines (Moghimi and Hunter, 2000;Mozafari et al, 2009), polysorbate 80, TPGS and polysaccharides like dextran (Stolnik et al, 1995;Torchilin and Trubetskoy, 1995;Mahapatro and Singh, 2011). Hydrophilic polymers can be useful at the surface of NPs by adsorption of surfactants or by utilize of block copolymers or branched copolymers (Stolnik et al, 1995;Storm et al, 1995;Torchilin and Trubetskoy, 1995;Mahapatro and Singh, 2011). Surface chemistry Analysis is determined by X-ray photoelectron spectroscopy (Mu and Feng, 2003;Si-Shen et al, 2004;Kim et al, 2005), Fourier transform infrared spectroscopy (Li et al, 2001;Choi and Kim, 2007;Yang et al, 2007) and Nuclear magnetic resonance spectroscopy (Li et al, 2001;Avgoustakis et al, 2002;Cheng et al, 2007;Dinarvand et al, 2011).…”