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Poly(ethylene glycol)‐Coated Fe 3 O 4 Nanoparticles by UV‐Thiol‐Ene Addition of PEG Dithiol on Vinyl‐Functionalized Magnetite Surface
Author(s) -
Amici Julia,
Allia Paolo,
Tiberto Paola,
Sangermano Marco
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100072
Subject(s) - dithiol , ethylene glycol , silanization , surface modification , superparamagnetism , nanoparticle , materials science , magnetite , polymer chemistry , magnetic nanoparticles , chemical engineering , vinyl alcohol , peg ratio , diethylene glycol , chemistry , nanotechnology , polymer , organic chemistry , magnetization , composite material , quantum mechanics , magnetic field , physics , finance , economics , engineering , metallurgy
Magnetite nanoparticles are synthesized and functionalized with vinyl groups (by silanization reaction with VTMS) and further coated with poly(ethylene glycol) dithiol under UV activation via thiol‐ene addition. TEM analysis is in a good agreement with DLS analyses and shows that by vinyl functionalization and following PEG coating it was possible to achieve nanometer‐sized particles with an average size of about 20–50 nm, well distributed and not‐aggregated. Superparamagnetic‐like behavior of coated Fe 3 O 4 nanoparticles, which is typically looked for in biomedical applications, is ensured by the Brownian motion of the magnetic NPs in the ferrofluid. The polymeric coating does not modify the magnetic response of the magnetite nanoparticles.