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http://hdl.handle.net/1942/4111
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DC Field | Value | Language |
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dc.contributor.author | De Palma, Randy | - |
dc.contributor.author | Peeters, Sara | - |
dc.contributor.author | Van Bael, Margriet | - |
dc.contributor.author | VAN DEN RUL, Heidi | - |
dc.contributor.author | Bonroy, Kristien | - |
dc.contributor.author | Laureyn, Wim | - |
dc.contributor.author | MULLENS, Jules | - |
dc.contributor.author | Borghs, Gustaaf | - |
dc.contributor.author | Maes, Guido | - |
dc.date.accessioned | 2007-12-10T10:51:15Z | - |
dc.date.available | 2007-12-10T10:51:15Z | - |
dc.date.issued | 2007 | - |
dc.identifier.citation | CHEMISTRY OF MATERIALS, 19(7). p. 1821-1831 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/1942/4111 | - |
dc.description.abstract | Ferrite magnetic nanoparticles (MNPs) were functionalized with a variety of silanes bearing different functional endgroups to render them stable with respect to aggregation and keep them well-dispersed in aqueous media. The MNPs were prepared by the thermal decomposition method, widely used for the synthesis of monodisperse nanoparticles with controllable size. This method makes use of a hydrophobic surfactant to passivate the surface, which results in nanoparticles that are solely dispersible in nonpolar solvents. For use in biological applications, these nanoparticles need to be made water-dispersible. Therefore, a new procedure was developed on the basis of the exchange of the hydrophobic surface ligands with silanes bearing different endgroups to decorate ferrite magnetic nanoparticles with diverse functionalities . By this means, we could easily determine the influence of the endgroup on the nanoparticle stability and water-dispersibility. Amino-, carboxylic acid- and poly(ethylene glycol)-terminated silanes were found to render the MNPs highly stable and water-dispersible because of electrostatic and/or steric repulsion. The silane molecules were also found to form a protective layer against mild acid and alkaline environments. The ligand exchange on the nanoparticle surface was thoroughly characterized using SQUID, TEM, XPS, DLS, TGA, FTIR, UV-vis, and zeta potential measurements. The presented approach provides a generic strategy to functionalize magnetic ferrite nanoparticles and to form stable dispersions in aqueous media, which facilitates the use of these magnetic nanoparticles in biological applications. | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Silane ligand exchange to make hydrophobic superparamagnetic nanoparticles water-dispersible | - |
dc.type | Journal Contribution | - |
dc.identifier.epage | 1831 | - |
dc.identifier.issue | 7 | - |
dc.identifier.spage | 1821 | - |
dc.identifier.volume | 19 | - |
local.format.pages | 11 | - |
local.bibliographicCitation.jcat | A1 | - |
dc.description.notes | IMEC, MCP ART, B-3001 Louvain, Belgium. Catholic Univ Louvain, B-3001 Louvain, Belgium. Hasselt Univ, Inst Mat Res, Lab Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium. IMEC Div IMOMEC, B-3590 Diepenbeek, Belgium.De Palma, R, IMEC, MCP ART, Kapeldreef 75, B-3001 Louvain, Belgium.Randy.Depalma@imec.be | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
dc.bibliographicCitation.oldjcat | A1 | - |
dc.identifier.doi | 10.1021/cm0628000 | - |
dc.identifier.isi | 000245208100039 | - |
item.accessRights | Closed Access | - |
item.fullcitation | De Palma, Randy; Peeters, Sara; Van Bael, Margriet; VAN DEN RUL, Heidi; Bonroy, Kristien; Laureyn, Wim; MULLENS, Jules; Borghs, Gustaaf & Maes, Guido (2007) Silane ligand exchange to make hydrophobic superparamagnetic nanoparticles water-dispersible. In: CHEMISTRY OF MATERIALS, 19(7). p. 1821-1831. | - |
item.contributor | De Palma, Randy | - |
item.contributor | Peeters, Sara | - |
item.contributor | Van Bael, Margriet | - |
item.contributor | VAN DEN RUL, Heidi | - |
item.contributor | Bonroy, Kristien | - |
item.contributor | Laureyn, Wim | - |
item.contributor | MULLENS, Jules | - |
item.contributor | Borghs, Gustaaf | - |
item.contributor | Maes, Guido | - |
item.fulltext | No Fulltext | - |
item.validation | ecoom 2008 | - |
crisitem.journal.issn | 0897-4756 | - |
crisitem.journal.eissn | 1520-5002 | - |
Appears in Collections: | Research publications |
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