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Hybrid magnetite–gold nanoparticles as bifunctional magnetic–plasmonic systems: three representative cases

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Abstract

Hybrid systems based on magnetite and gold nanoparticles have been extensively used as bifunctional materials for bio- and nano-technology. The properties of these composites are assumed to be closely related to the magnetite to gold mass ratio and to the geometry of the resulting hetero-structures. To illustrate this, we compare and analyze the optical and magnetic properties of core–shell, dumbbell-like dimers and chemical cross-linked pairs of magnetite and gold nanoparticles in detail. We explore how the combination of gold with magnetite can lead to an improvement of the optical properties of these systems, such as tunability, light scattering enhancement or an increase of the local electric field at the interface between magnetic and plasmonic constituents. We also show that although the presence of gold might affect the magnetic response of these hybrid systems, they still show good performance for magnetic applications; indeed the resulting magnetic properties are more dependent on the NP size dispersion. Finally, we identify technological constraints and discuss prospective routes for the development of further magnetic–plasmonic materials.

Graphical abstract: Hybrid magnetite–gold nanoparticles as bifunctional magnetic–plasmonic systems: three representative cases

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Publication details

The article was received on 15 Dec 2016, accepted on 12 Apr 2017 and first published on 12 Apr 2017


Article type: Communication
DOI: 10.1039/C6NH00225K
Citation: Nanoscale Horiz., 2017, Advance Article
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    Hybrid magnetite–gold nanoparticles as bifunctional magnetic–plasmonic systems: three representative cases

    J. Canet-Ferrer, P. Albella, A. Ribera, J. V. Usagre and S. A. Maier, Nanoscale Horiz., 2017, Advance Article , DOI: 10.1039/C6NH00225K

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