Fabrication of NIR-excitable SERS-active composite particles composed of densely packed au nanoparticles on polymer microparticles

Masaaki Kanahara, Hiroki Satoh, Takeshi Higuchi, Atsushi Takahara, Hiroshi Jinnai, Koji Harano, Satoshi Okada, Eiichi Nakamura, Yasutaka Matsuo, Hiroshi Yabu

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A simple fabrication method is demonstrated for surface-enhanced Raman scattering (SERS)-active plasmonic nanoballs, which consisted of Au nanoparticles (NPs) and core-shell polystyrene and amino-terminated poly(butadiene) particles, by heterocoagulation and Au NP diffusion. The amount of Au NPs introduced into the core-shell particles increases with the concentration of Au NPs added to the aqueous dispersion of the core-shell particles. When the amount of Au NPs increases, closely packed, three-dimensionally arranged and close-packed Au NPs arrays are formed in the shells. Strong SERS signals from para-mercaptophenol adsorbed onto composite particles with multilayered Au NPs arrays are obtained by near-infrared (NIR) light illumination. A novel way of fabricating surface-enhanced Raman scattering (SERS)-active nanocomoposite particles is presented, which can be excited by near infrared (NIR) lights.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalParticle and Particle Systems Characterization
Volume32
Issue number4
DOIs
Publication statusPublished - Apr 1 2015

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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