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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)8641-8643
Number of pages3
JournalJapanese journal of applied physics
Volume47
Issue number11
DOIs
Publication statusPublished - 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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  • Cite this

    Nomura, K. I., Fujii, S., Ohki, Y., Awazu, K., Fujimaki, M., Tominaga, J., Fukuda, N., Hirakawa, T., & Rockstuhl, C. (2008). Fabrication of inert silver nanoparticles with a thin silica coating. Japanese journal of applied physics, 47(11), 8641-8643. https://doi.org/10.1143/JJAP.47.8641