Document Type
Article
Original Publication Date
2010
Journal/Book/Conference Title
Journal of Applied Physics
Volume
107
Issue
9
DOI of Original Publication
10.1063/1.3355905
Date of Submission
October 2015
Abstract
Metallic nanoparticles (NPs) are suitable platforms for miniaturized biosensing based on their optical and magneto-opticalproperties. It is possible to enhance the sensitivity of specific kinds of NPs by exploiting their optical and magneto-opticalproperties under suitable external magnetic field modulation. Here, the magneto-opticalproperties of Fe–Ag core-shell ferromagnet-noble metal NPs have been investigated as a function of the incident light frequency. For Fe–Ag NPs with a concentration ratio around 25:75, an optical absorption band centered at 3 eV due to localized surface plasmon resonance (LSPR) excitation is observed. A strong enhancement of the Faraday rotation is also observed, greatly exceeding the value estimated for pure Fe NPs, also associated with the LSPR excitation. Our findings open up the possibility of highly sensitive miniaturized magneto-optically modulated biosensing.
Rights
Wang, L., Yang, K., & Clavero, C., et al. Localized surface plasmon resonance enhanced magneto-optical activity in core-shell Fe-Ag nanoparticles. Journal of Applied Physics, 107, 09B303 (2010). Copyright © 2010 American Institute of Physics.
Is Part Of
VCU Chemistry Publications
Comments
Originally published at http://dx.doi.org/10.1063/1.3355905