Novel and Sensitive Core-Shell Nanoparticles Based on Surface Plasmon Resonance

In this paper, a rough silver core-shell nanoparticle with strong electric field enhancement in the vicinity of a bumpy structure on the silver core-shell surface is reported. A dipolar plasmonic mode of the silver nanoshell is investigated by using the quasi-static approach and plasmon hybridizatio...

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Bibliographic Details
Published in:Plasmonics (Norwell, Mass.) Mass.), 2018-02, Vol.13 (1), p.155-161
Main Authors: Saliminasab, Maryam, Garaei, Marzieh Afkhami, Moradian, Rostam, Nadgaran, Hamid
Format: Article
Language:English
Subjects:
Biochemistry
Biological and Medical Physics
Biophysics
Biotechnology
Chemistry
Chemistry and Materials Science
Core-shell particles
Electric fields
Hemoglobin
Nanoparticles
Nanotechnology
Raman spectra
Serum albumin
Shells
Surface plasmon resonance
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Summary:In this paper, a rough silver core-shell nanoparticle with strong electric field enhancement in the vicinity of a bumpy structure on the silver core-shell surface is reported. A dipolar plasmonic mode of the silver nanoshell is investigated by using the quasi-static approach and plasmon hybridization theory, which analytical results identify the electric field enhancement spectra in which the enhancement is optimized. As the silver shell thickness is small, the hot spots play an important role in the plasmonic field enhancement. In addition, the deposition of a rough silver shell can generate a stronger near-field enhancement near the silver surface which is more desirable than that of a smooth silver shell for sensitive detection based on SPR and surface enhanced Raman scattering (SERS). The plasmonic field enhancement of a bumpy silver core-shell nanoparticle permits the detection and characterization of bovine serum albumin (BSA) protein molecule and hemoglobin solution with a high sensitivity.
ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-016-0495-8