Scaling Relations of Plasmon Resonance Peak in Au@Fe3O4 Core-Shell Nanohybrids Structure

In this paper, we study the absorption efficiency spectra of Au nanoparticles enveloped with Fe 3 O 4 nanoshell by applying the discrete dipole approximation method. Three kinds of Au@Fe 3 O 4 core-shell nanohybrids (NHs) structure, including the same core with different shell thickness, the same ou...

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Bibliographic Details
Published in:Plasmonics (Norwell, Mass.) Mass.), 2019-10, Vol.14 (5), p.1123-1129
Main Authors: Zhang, Weichun, Ma, Haixia, Fan, Jiyu
Format: Article
Language:English
Subjects:
Biochemistry
Biological and Medical Physics
Biophysics
Biotechnology
Chemistry
Chemistry and Materials Science
Dipoles
Gold
Iron oxides
Material properties
Nanoparticles
Nanotechnology
Shells
Surface plasmon resonance
Thickness
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Summary:In this paper, we study the absorption efficiency spectra of Au nanoparticles enveloped with Fe 3 O 4 nanoshell by applying the discrete dipole approximation method. Three kinds of Au@Fe 3 O 4 core-shell nanohybrids (NHs) structure, including the same core with different shell thickness, the same outer shell with different core radius, and the same size of total radius, have been discussed in detail. The simulation results show that the square of localized surface plasmon resonance (LSPR) peak wavelength of NHs is linearly proportional with the volume fraction of the shell, regardless of the outer shell material properties. Compared to the plasmon resonance peak of the Au nanoparticles, the LSPR shift of the NHs is dependent on both the total particles size and the outer Fe 3 O 4 shell thickness. Our calculation results would provide some key guidances to design the structure variables of NHs for a broad range of plasmon applications.
ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-018-00901-w