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Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles
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Published on: August 26, 2018

Interfacial activity of phosphonated-PEG functionalized cerium oxide nanoparticles.

L Qi1, J Fresnais, P Muller

  • 1Complex Assemblies of Soft Matter Laboratory (COMPASS)-CNRS UMI3254, Rhodia Center for Research and Technology in Bristol, Bristol, Pennsylvania 19007, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|July 17, 2012
PubMed
Summary
This summary is machine-generated.

Functionalized cerium oxide nanoparticles exhibit strong interfacial activity, enabling precise control over surface modification and assembly. These nanoparticles can form stable monolayers and multilayers on various surfaces, impacting polymer modification and Pickering emulsions.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Phosphonic acid terminated polyethylene glycol (PEG) oligomers can functionalize cerium oxide nanoparticles.
  • These functionalized nanoparticles form stable, redispersible suspensions in various solvents.

Purpose of the Study:

  • To investigate the interfacial activity of functionalized ceria nanoparticles.
  • To demonstrate their potential for modifying hydrophobic surfaces and controlling self-assembly.

Main Methods:

  • Investigated phosphonated-PEG oligomers as surface-active species.
  • Studied the adsorption behavior of functionalized nanoparticles at different interfaces (air/water, polystyrene/water, oil/water).
  • Utilized Langmuir trough and Grazing-Incidence Small-Angle X-ray Scattering (GISAXS) for monolayer characterization.

Main Results:

  • Functionalized ceria nanoparticles exhibit significant interfacial activity.
  • Addition of PEG oligomers with aliphatic chains (stickers) tunes nanoparticle adsorption and interparticle interactions.
  • Dense, ordered 2D nanoceria monolayers with hexagonal organization were formed.
  • Stable mono- or multilayers were formed and transferred onto solid surfaces.

Conclusions:

  • Functionalized ceria nanoparticles possess tunable interfacial properties for surface modification.
  • These nanoparticles are effective in creating ordered supracolloidal assemblies and stabilizing emulsions.
  • The findings are significant for polymer surface modification, Pickering emulsions, and supracolloidal assembly applications.