Rapid assembly of carbon nanotube-based magnetic composites

Alina V. Korobeinyk, Raymond L D Whitby, Jun Jie Niu, Yury Gogotsi, Sergey V. Mikhalovsky

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The rapid assembly of magnetic carbon nanotubes is mediated through the electrostatic attraction of α-haematite nanoparticles to carboxylic groups decorating their outer surface. The system is then stabilised through covalently bonding a silica coat using a 3-aminopropyltriethoxysilane precursor, which creates a thin barrier protecting the α-haematite particles from aggressive pH solutions. The nanocomposites can be effectively dispersed in aqueous solution and can be attracted to an external magnetic field. The proposed method can be used for synthesis of magnetic CNTs suitable for assembling densely packed magnetic arrays, remotely guided drug delivery and organic chemical wastewater remediation with the added benefit of nanomaterial recovery. Therein, p-nitroaniline was demonstrated to still adsorb to uncoated areas of the silica-sheathed magnetic MWCNT composite.

Original languageEnglish
Pages (from-to)514-518
Number of pages5
JournalMaterials Chemistry and Physics
Volume128
Issue number3
DOIs
Publication statusPublished - Aug 15 2011
Externally publishedYes

Keywords

  • 3-Aminopropyltriethoxysilane (APTES)
  • Carbon nanotubes (CNTs)
  • Magnetic nanoparticles
  • α-Haematite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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