Preparation of ultrafine silica- and PEG-coated magnetite particles

By M. Butterworth, L. Illum, S. S. Davis. 2001

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Magnetic Nanoparticles: Surface Effects and Properties Related to Biomedicine Applications (2013, background): “settling by reducing the inter-particle dipole-dipole forces [116–121].”
Magnetic nanoparticles in MR imaging and drug delivery. (2008, methodology): “Various methods have been utilized to attach PEG to MNPs including silane grafting to oxide surfaces [73], polymerization at the surface of”
Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles (2010, background): “Again, the conjugation chemistry used for PEGylation and the further modification does not depend any more on the material of the particle cores and applies in the same way for other particle species (Butterworth et al. 2001; Zillies et al. 2007).”
Design and fabrication of magnetic nanoparticles for targeted drug delivery and imaging (2009, background): “At sizes below 100,000 Da, PEG polymers are considered amphiphilic and are soluble in water as well as in many organic solvents, including methylene chloride, ethanol, toluene, acetone, and chloroform.”
Nanoparticle PEGylation for imaging and therapy (2011, background): “Thermogravimetric analysis measures change in weight as a function of temperature increase (PEG loss) and is reported for this purpose, but also requires specialized equipment [117].”