Plasmonic and Magnetically Responsive Gold ShellMagnetic Nanorod Hybrids
Technical Report,01 Jun 2016,31 Dec 2016
US Army Research Laboratory Adelphi United States
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In this work we demonstrated a new methodology to create asymmetric magnetic nanorods with a plasmonically active gold outer shell. The multistage approach involves the synthesis of a precursor iron III oxide-hydroxide FeOOH nanorod, where the incorporation of a protective silica SiO2 shell allows for the materialmorphology to survive hydrothermal treatment and subsequent transition to magnetically responsive iron II, III oxide Fe3O4. On the magnetic nanorod-SiO2 particle, a thin gold layer is grown to directly introduce tailorable plasmonic properties. This approach is demonstrated applicable to both spherical and asymmetric morphologies, allowing the hybrid materials to be readily engineered for precise magnetic and plasmonic responses.
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- Electricity and Magnetism