Particle speciation during PEG–Fe3O4 hybrid nanoparticle self-assembly on Si(Ti)O2
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The kinetics of assembly of polyethylene glycol (PEG)-coated superparamagnetic Fe3O4 nanoparticles in aqueous suspension on planar Si(Ti)O2 surfaces have been determined using high-resolution optical waveguide lightmode spectroscopy (OWLS). Analysis of the results revealed that the initially uniform population was spontaneously transformed into two types of particles with significantly different adsorption behaviour.
KeywordsOptical waveguide lightmode spectroscopy Magnetite Adsorption Desorption Programmed self-assembly Nanofilm
This work was supported by the Hungarian Scientific Research Fund (OTKA PD 73084) and by the European Commission (OPTIBIO 231055).