Metal-ion adsorption on carboxyl-bearing self-assembled monolayers covalently bound to magnetic nanoparticles

Bin Hai, Jun Wu, Xufang Chen, John D. Protasiewicz, Daniel Alberto Scherson

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Hematite nanoparticles have been functionalized with a self-assembled monolayer of undecanoic acid (UA) by covalent attachment via siloxane groups. The number density of carboxylic/carboxylate groups on the surface was determined by titration, yielding values on the order of 10 14 UA molecules/cm 2 and thus consistent with a closed-packed monolayer. The ability of these functionalized particles to adsorb Cd 2+ in the ppm range was demonstrated using in situ anodic stripping voltammetry.

Original languageEnglish
Pages (from-to)3104-3105
Number of pages2
JournalLangmuir
Volume21
Issue number7
DOIs
Publication statusPublished - 2005 Mar 29
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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