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Facile Synthesis and X-ray Attenuation Properties of Ultrasmall Platinum Nanoparticles Grafted with Three Types of Hydrophilic Polymers

  • Kyungpook National University
  • Korea Institute of Radiological and Medical Sciences

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Ultrasmall platinum nanoparticles (Pt-NPs) grafted with three types of hydrophilic and biocompatible polymers, i.e., poly(acrylic acid), poly(acrylic acid-co-maleic acid), and poly(methyl vinyl ether-alt-maleic acid) were synthesized using a one-pot polyol method. Their physicochemical and X-ray attenuation properties were characterized. All polymer-coated Pt-NPs had an average particle diameter (davg) of 2.0 nm. Polymers grafted onto Pt-NP surfaces exhibited excellent colloidal stability (i.e., no precipitation after synthesis for >1.5 years) and low cellular toxicity. The X-ray attenuation power of the polymer-coated Pt-NPs in aqueous media was stronger than that of the commercial iodine contrast agent Ultravist at the same atomic concentration and considerably stronger at the same number density, confirming their potential as computed tomography contrast agents.

Original languageEnglish
Article number806
JournalNanomaterials
Volume13
Issue number5
DOIs
StatePublished - Mar 2023

Keywords

  • computed tomography contrast agent
  • high X-ray attenuation power
  • hydrophilic and biocompatible polymer coating
  • ultrasmall Pt nanoparticle

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