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Related Experiment Videos

Polymer-Coated Ultrastable and Biofunctionalizable Lanthanide Nanoparticles.

Yurong Que1, Chun Feng1, Guolin Lu1

  • 1Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China.

ACS Applied Materials & Interfaces
|April 14, 2017
PubMed
Summary

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We developed a surface coating for lanthanide-containing nanoparticles (LnNPs) to improve their water dispersity and stability. This enhancement allows for freeze-drying, increasing shelf life and simplifying storage of these valuable nanomaterials.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Lanthanide-containing nanoparticles (LnNPs) possess unique magnetic and upconversion fluorescent properties, making them promising for various applications.
  • However, their practical use is limited by poor water dispersibility, low colloidal stability, and challenges in functionalization.

Purpose of the Study:

  • To overcome the limitations of LnNPs by developing a facile surface modification strategy.
  • To enhance the water dispersity, colloidal stability, and functionalization capabilities of LnNPs.

Main Methods:

  • Surface-coating LnNPs with poly(ethylene glycol)-b-poly(pentafluorophenyl methacrylate)/phosphonic acid.
  • Shell cross-linking the coated LnNPs with NH2-PEG-NH2.
Keywords:
block copolymercolloidal stabilitylanthanidelyophilizationnanoparticlenonfoulingsurface coating

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Main Results:

  • The cross-linked PEG layer significantly improved water dispersity and long-term colloidal stability (25-60 °C).
  • The functional coating facilitated easy incorporation of various moieties via reaction with the pentafluorophenyl ester.
  • LnNPs with the surface coating successfully endured freeze-drying without aggregation, preserving their properties.

Conclusions:

  • The developed surface modification strategy effectively addresses key limitations of LnNPs.
  • The enhanced LnNPs exhibit improved stability, dispersibility, and functionalization potential.
  • The ability to freeze-dry LnNPs opens new avenues for storage, transport, and application, especially for bioconjugated systems.