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Correction: Zueva et al. Steady-State Kinetics of Enzyme-Catalyzed Hydrolysis of Echothiophate, a P-S Bonded Organophosphorus as Monitored by Spectrofluorimetry. <i>Molecules</i> 2020, <i>25</i>, 1371.

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Iron Oxide/Polymer Core-Shell Nanomaterials with Star-like Behavior.

Virginie Vergnat1, Benoît Heinrich1, Michel Rawiso2

  • 1Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Université de Strasbourg, UMR7504, 23 Rue du Lœss, BP 43, 67034 Strasbourg, France.

Nanomaterials (Basel, Switzerland)
|September 28, 2021
PubMed
Summary

Researchers developed a scalable method to create polymer-coated iron oxide nanoparticles. This technique enables controlled synthesis of hybrid nanoparticles with improved stability and tunable properties for various applications.

Keywords:
X-ray scatteringgrafting from methodhybrid materialsneutron scatteringnon-aggregated nanoparticlesstar polymers

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Chemistry

Background:

  • Controlling nanoparticle aggregation is crucial for their application.
  • Polymer shells offer high thickness but pose challenges in synthesizing regular hybrid structures at scale.

Purpose of the Study:

  • To develop a scalable, multi-step synthesis for polymer-coated iron oxide nanoparticles.
  • To create non-aggregated maghemite (γ-Fe2O3) nanoparticles with polystyrene (PS) or polymethyl methacrylate (PMMA) shells.

Main Methods:

  • Multi-gram batch synthesis of iron oxide nanoparticles via thermal decomposition.
  • Covalent grafting of an atom transfer radical polymerization (ATRP) initiator onto nanoparticle cores.
  • Controlled growth of polymer shells (PS or PMMA) using ATRP.

Main Results:

  • Successfully synthesized non-aggregated iron oxide nanoparticles (approx. 13 nm core diameter).
  • Achieved polymer shells, resulting in hybrid nanoparticles with an overall diameter of approximately 60 nm.
  • Characterized nanoparticle cores using DLS, TEM, and SAXS; overall structure analyzed by SANS.
  • Observed solution and melt rheological properties similar to star polymers.

Conclusions:

  • The three-step synthesis provides a scalable route to polymer-coated iron oxide nanoparticles.
  • The resulting hybrid nanoparticles exhibit controlled size and desirable rheological behavior.
  • Further strategies can enhance nanoparticle core screening by polymer shells.