http://dx.doi.org/10.1039/C4NJ01005A">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Shear disassembly of hierarchical superparamagnetic Fe3O4 hollow nanoparticle necklace chains

Language

English

Abstract

© 2014 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.Supramolecular amide hydrogen-bond interactions between bundles of necklace-like chains based on superparamagnetic hollow Fe3O4 nanoparticle beads could be indirectly quantified by shear stress and magnetorheological analyses. First, a facile magnetic field-induced method was developed for the preparation of the superparamagnetic Fe3O4 hierarchical chain structures. Primary Fe3O4 hollow nanospheres, hollow nanosphere-assembled chains, and partially hollow nanosphere-assembled chains were successfully prepared. These superparamagnetic nanoparticles and chains could be well dispersed in aqueous solutions. The magnetic hollow nanoparticle chains possess a strong magnetorheological effect in aqueous solutions. Bundle wire-like structures based on chains or nanospheres could be formed with different magnetic field alignments. The hollow nanostructure greatly strengthens the as-formed bundle wire-like structures such that the chains have a larger magnetorheological effect than that of the hollow nanospheres. It is envisaged that a specific cell transfection mechanism of chains and wires could involve a partial disassembly from bundles to individual chains/wires before endocytosis. The force that is exerted on this disassembly from bundles to individual chains/wires in a specific medium, which are quantified by shear stress and magnetorheological analyses, would shed light on cell magnetofection mechanisms.

Publication Date

2014

Source Publication Title

New Journal of Chemistry

Volume

38

Issue

12

Start Page

6125

End Page

6132

Publisher

Royal Society of Chemistry

ISSN (print)

11440546

ISSN (electronic)

13699261

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