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Angew Chem Int Ed Engl. 2018 Feb 12;57(7):1841-1845. doi: 10.1002/anie.201710619. Epub 2018 Jan 16.

Fourier Transform Surface Plasmon Resonance (FTSPR) with Gyromagnetic Plasmonic Nanorods.

Author information

1
Department of Chemistry and Energy Science, Sungkyunkwan University, Suwon, 440-746, South Korea.
2
Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul, 151-747, South Korea.

Abstract

An unprecedented active and dynamic sensing platform based on a LSPR configuration that is modulated by using an external magnetic field is reported. Electrochemically synthesized Au/Fe/Au nanorods exhibited plasmonically active behavior through plasmonic coupling, and the middle ferromagnetic Fe block responded to a magnetic impetus, allowing the nanorods to be modulated. The shear force variation induced by the specific binding events between antigens and antibodies on the nanorod surface is used to enhance the sensitivity of detection of antigens in the plasmonics-based sensor application. As a proof-of-concept, influenza A virus (HA1) was used as a target protein. The limit of detection was enhanced by two orders of magnitude compared to that of traditional LSPR sensing.

KEYWORDS:

Fourier transformation; UV/Vis spectroscopy; magnetic nanorods; plasmonics; surface plasmon resonance

PMID:
29266670
DOI:
10.1002/anie.201710619
[Indexed for MEDLINE]

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