title: In situ functionalization and PEO coating of iron oxide nanocrystals using seeded emulsion polymerization.
abstract: Herein we demonstrate that seeded emulsion polymerization is a powerful tool to produce multiply functionalized PEO coated iron oxide nanocrystals. Advantageously, by simple addition of functional surfactants, functional monomers, or functional polymerizable linkers-solely or in combinations thereof-during the seeded emulsion polymerization process, a broad range of in situ functionalized polymer-coated iron oxide nanocrystals were obtained. This was demonstrated by purposeful modulation of the zeta potential of encapsulated iron oxide nanocrystals and conjugation of a dyestuff. Successful functionalization was unequivocally proven by TXRF. Furthermore, the spatial position of the functional groups can be controlled by choosing the appropriate spacers. In conclusion, this methodology is highly amenable for combinatorial strategies and will spur rapid expedited synthesis and purposeful optimization of a broad scope of nanocrystals.
authors.affiliation: Institute of Physical Chemistry, University of Hamburg, Hamburg, Germany.
authors.forename: Hauke
authors.initials: H
authors.lastname: Kloust
authors.forename: Christian
authors.initials: C
authors.lastname: Schmidtke
authors.forename: Artur
authors.initials: A
authors.lastname: Feld
authors.forename: Theo
authors.initials: T
authors.lastname: Schotten
authors.forename: Robin
authors.initials: R
authors.lastname: Eggers
authors.forename: Ursula E A
authors.initials: UE
authors.lastname: Fittschen
authors.forename: Florian
authors.initials: F
authors.lastname: Schulz
authors.forename: Elmar
authors.initials: E
authors.lastname: Pöselt
authors.forename: Johannes
authors.initials: J
authors.lastname: Ostermann
authors.forename: Neus G
authors.initials: NG
authors.lastname: Bastús
authors.forename: Horst
authors.initials: H
authors.lastname: Weller
mesh_terms: D004655:Emulsions / Q000138:chemical synthesis / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry*; D008958:Models, Molecular; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011092:Polyethylene Glycols / Q000138:chemical synthesis / Q000737:chemistry*; D058105:Polymerization; D013499:Surface Properties
chemical_list: D004655:Emulsions; D005290:Ferric Compounds; C000499:ferric oxide; D011092:Polyethylene Glycols