Widely Tunable Plasmon Resonances from Visible to Near-Infrared of Hollow Silver Nanoshells

Abstract Tuning of localized surface plasmon resonance (LSPR) of metal nanostructures has attracted a great deal of interest, and the controlled syntheses of them have been extensively studied for fine tuning of their LSPR. In this paper, we report widely tunable LSPR from visible to near-infrared o...

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Bibliographic Details
Published inBulletin of the Chemical Society of Japan Vol. 90; no. 5; pp. 537 - 545
Main Authors Kado, Shinpei, Yokomine, Shoichi, Kimura, Keiichi
Format Journal Article
LanguageEnglish
Published Tokyo Chemical Society of Japan 2017
Subjects
Dimpling
Dipoles
Near infrared radiation
Quadrupoles
Shells
Silver
Thickness
Thiocyanates
Transmission electron microscopy
Tuning
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Summary:Abstract Tuning of localized surface plasmon resonance (LSPR) of metal nanostructures has attracted a great deal of interest, and the controlled syntheses of them have been extensively studied for fine tuning of their LSPR. In this paper, we report widely tunable LSPR from visible to near-infrared of hollow silver nanoshells synthesized by reduction of silver thiocyanate. The silver nanoshell exhibits size- and thickness-dependent LSPR for symmetric dipole mode from visible to near-infrared regions, while the antisymmetric dipole resonance is not changed. By combining characterization of the nanoshells by transmission electron microscopy and theoretical simulation based on discrete dipole approximation, we reveal that the LSPRs are controlled by the size and shell thickness of the nanoshells and also that dimples on the shell surfaces would significantly affect the LSPRs of symmetric dipole, and quadrupole mode for larger nanoshells.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.20160389