Jump to main content
Jump to site search

Issue 44, 2015
Previous Article Next Article

Sandwich-structured Fe2O3@SiO2@Au nanoparticles with magnetoplasmonic responses

Author affiliations

Abstract

We report a method for the fabrication of relatively uniform sandwich-like core-interlayer-shell nanostructures by using γ-Fe2O3 as the inner core, SiO2 as the interlayer, and relatively uniform gold (Au) as the outer shell. The resulting novel hybrid nanoparticle combines the intense local fields of nanorods with the highly tunable plasmon resonances of nanoshells. The length and diameter of the resulting nanoparticles can be tuned by the aspect ratio of α-Fe2O3, the interlayer of SiO2 and the outer layer of Au. After calcination under H2 and then exposure to air, α-Fe2O3 was transformed into γ-Fe2O3, which provides the hybrid particle magnetic tunability. This metal oxide (γ-Fe2O3) dielectric core, the SiO2 interlayer and the Au shell spindle nanoparticle resemble a grain of Au nanorice (γ-Fe2O3@SiO2@Au ellipsoids). The core-interlayer-shell geometry possesses greater structural and magnetic tunability than a nanorod or a nanoshell. The plasmon resonance of this novel γ-Fe2O3@SiO2@Au geometry is believed to arise from a hybridization of the primitive plasmons of an ellipsoidal cavity inside a continuous Au shell. The unique magnetoplasmonic properties of this γ-Fe2O3@SiO2@Au nanostructure are highly attractive for applications such as surface plasmon resonance sensing because of the dipole resonance of the resultant nanostructure and recyclable catalysts arising from the outer Au layer and the inner magnetic γ-Fe2O3 core.

Graphical abstract: Sandwich-structured Fe2O3@SiO2@Au nanoparticles with magnetoplasmonic responses

Back to tab navigation

Supplementary files

Article information


Submitted
05 May 2015
Accepted
09 Oct 2015
First published
09 Oct 2015

J. Mater. Chem. C, 2015,3, 11645-11652
Article type
Paper
Author version available

Sandwich-structured Fe2O3@SiO2@Au nanoparticles with magnetoplasmonic responses

Z. Cai, E. S. P. Leong, Z. Wang, W. Niu, W. Zhang, S. Ravaine, N. L. Yakovlev, Y. J. Liu, J. Teng and X. Lu, J. Mater. Chem. C, 2015, 3, 11645 DOI: 10.1039/C5TC01259G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements