Fabrication of inert silver nanoparticles with a thin silica coating

Ken Ichi Nomura; Shinji Fujii; Yoshimichi Ohki; Koichi Awazu; Makoto Fujimaki; Junji Tominaga; Nobuko Fukuda; Tsutomu Hirakawa; Carsten Rockstuhl

doi:10.1143/JJAP.47.8641

Fabrication of inert silver nanoparticles with a thin silica coating

Ken Ichi Nomura^*, Shinji Fujii, Yoshimichi Ohki, Koichi Awazu, Makoto Fujimaki, Junji Tominaga, Nobuko Fukuda, Tsutomu Hirakawa, Carsten Rockstuhl

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We present a genuine experimental technique to fabricate silver nanoparticles with an ultrathin silica coating, thus making the nanoparticles chemically inert. The impact of the coating on plasmonic properties is experimentally quantified and compared with theoretical predictions. Furthermore, numerical simulations of the near-field enhancing properties of the nanoparticles are conducted. It is found that the coatings fabricated are sufficiently thin to make the plasmonic resonance wavelength shift negligible and for observing a significant field enhancement on the surface of the silica shell at the resonance wavelength. Application of such inert nanoparticles to sensitize the absorption of near-ultraviolet light is discussed.

Original language	English
Pages (from-to)	8641-8643
Number of pages	3
Journal	Japanese journal of applied physics
Volume	47
Issue number	11
DOIs	https://doi.org/10.1143/JJAP.47.8641
Publication status	Published - 2008 Nov 14

Keywords

Coating
Electric field
Localized surface plasmon
Nanoparticle
Optical absorption
Silica
Silver

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.47.8641

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title = "Fabrication of inert silver nanoparticles with a thin silica coating",

abstract = "We present a genuine experimental technique to fabricate silver nanoparticles with an ultrathin silica coating, thus making the nanoparticles chemically inert. The impact of the coating on plasmonic properties is experimentally quantified and compared with theoretical predictions. Furthermore, numerical simulations of the near-field enhancing properties of the nanoparticles are conducted. It is found that the coatings fabricated are sufficiently thin to make the plasmonic resonance wavelength shift negligible and for observing a significant field enhancement on the surface of the silica shell at the resonance wavelength. Application of such inert nanoparticles to sensitize the absorption of near-ultraviolet light is discussed.",

keywords = "Coating, Electric field, Localized surface plasmon, Nanoparticle, Optical absorption, Silica, Silver",

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AU - Nomura, Ken Ichi

AU - Fujii, Shinji

AU - Ohki, Yoshimichi

AU - Awazu, Koichi

AU - Fujimaki, Makoto

AU - Tominaga, Junji

AU - Fukuda, Nobuko

AU - Hirakawa, Tsutomu

AU - Rockstuhl, Carsten

PY - 2008/11/14

Y1 - 2008/11/14

N2 - We present a genuine experimental technique to fabricate silver nanoparticles with an ultrathin silica coating, thus making the nanoparticles chemically inert. The impact of the coating on plasmonic properties is experimentally quantified and compared with theoretical predictions. Furthermore, numerical simulations of the near-field enhancing properties of the nanoparticles are conducted. It is found that the coatings fabricated are sufficiently thin to make the plasmonic resonance wavelength shift negligible and for observing a significant field enhancement on the surface of the silica shell at the resonance wavelength. Application of such inert nanoparticles to sensitize the absorption of near-ultraviolet light is discussed.

AB - We present a genuine experimental technique to fabricate silver nanoparticles with an ultrathin silica coating, thus making the nanoparticles chemically inert. The impact of the coating on plasmonic properties is experimentally quantified and compared with theoretical predictions. Furthermore, numerical simulations of the near-field enhancing properties of the nanoparticles are conducted. It is found that the coatings fabricated are sufficiently thin to make the plasmonic resonance wavelength shift negligible and for observing a significant field enhancement on the surface of the silica shell at the resonance wavelength. Application of such inert nanoparticles to sensitize the absorption of near-ultraviolet light is discussed.

KW - Coating

KW - Electric field

KW - Localized surface plasmon

KW - Nanoparticle

KW - Optical absorption

KW - Silica

KW - Silver

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Fabrication of inert silver nanoparticles with a thin silica coating

Abstract

Keywords

ASJC Scopus subject areas

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