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

doi:10.1021/la0487139

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

44 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 language	English
Pages (from-to)	3104-3105
Number of pages	2
Journal	Langmuir
Volume	21
Issue number	7
DOIs	https://doi.org/10.1021/la0487139
Publication status	Published - 2005 Mar 29
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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10.1021/la0487139

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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.",

author = "Bin Hai and Jun Wu and Xufang Chen and Protasiewicz, {John D.} and Scherson, {Daniel Alberto}",

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AU - Hai, Bin

AU - Wu, Jun

AU - Chen, Xufang

AU - Protasiewicz, John D.

AU - Scherson, Daniel Alberto

PY - 2005/3/29

Y1 - 2005/3/29

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AB - 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.

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

Abstract

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