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Synthesis of naked plasmonic/magnetic Au/Fe 3 O 4 nanostructures by plasmon-driven anti-replacement reaction

In this study, naked Au(core)/Fe O (shell) hybrid nanostructures are rapidly synthesized by a plasmon-driven anti-replacement reaction. The Au nanoparticles are prepared by pulsed laser ablation in water. The mixture of Au nanoparticles and FeCl solution is irradiated under a laser with a specific w...

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Bibliographic Details
Published in:Nanotechnology 2019-02, Vol.30 (6), p.065605
Main Authors: Pan, Shusheng, Liu, Zhiyu, Lu, Wei
Format: Article
Language:English
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Summary:In this study, naked Au(core)/Fe O (shell) hybrid nanostructures are rapidly synthesized by a plasmon-driven anti-replacement reaction. The Au nanoparticles are prepared by pulsed laser ablation in water. The mixture of Au nanoparticles and FeCl solution is irradiated under a laser with a specific wavelength. The Fe ions are reduced to low valence species by the 'hot electrons' in Au, and form the Fe O spindles on the surface of Au nanoparticles. The Au nanoparticles are synchronously oxidized to Au and Au ions by the 'hot holes'. The saturation magnetization and coercivity of Fe O spindles are 48.7 emu g and 218.9 Oe, respectively. Our work provides a facile route to obtain the naked Au/Fe O plasmonic/magnetic nanostructures.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/aaf17c