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Fabrication of water-soluble magnetic nanoparticles by ligand-exchange with thermo-responsive polymers

Robinson, I; Alexander, C; Tung, LD; Fernig, DG; Thanh, NTK; (2009) Fabrication of water-soluble magnetic nanoparticles by ligand-exchange with thermo-responsive polymers. In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. (pp. 1421 - 1423). ELSEVIER SCIENCE BV

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Abstract

We report the use of thermo-responsive polymers in the synthesis of Co and gamma-Fe2O3 nanoparticles using a two-step method involving thermal decomposition of the organometallic complexes in the presence of oleic acid and then followed by ligand-exchange process with thermo-responsive polymer. Among different thermo-responsive polymers investigated, it was found that the polymer based on poly(N-isopropylacrylamide) with a co-monomer component of acrylic acid and acrylamide can be used in the ligand-exchange to coat Co and gamma-Fe2O3 nanoparticles, respectively. The nanoparticles are found to be water-soluble at temperatures below coil-to-globule phase transition of the coating polymer. (C) 2009 Elsevier B.V. All rights reserved.

Type: Proceedings paper
Title: Fabrication of water-soluble magnetic nanoparticles by ligand-exchange with thermo-responsive polymers
Event: 7th International Conference on Scientific and Clinical Applications of Magnetic Carriers
Location: Vancouver, CANADA
Dates: 2008-05-20 - 2008-05-24
DOI: 10.1016/j.jmmm.2009.02.055
Keywords: Magnetic nanoparticle, Thermo-responsive polymer, Ligand-exchange, Nanoparticle characterization, IRON-OXIDE NANOPARTICLES, CO NANOPARTICLES, NANOCRYSTALS, SIZE, BIOMEDICINE
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/105759
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