X-ray absorption of gold nanoparticles with thin silica shell

Yeon Su Park, Luis M. Liz-Marzán, Atsuo Kasuya, Yoshio Kobayashi, Daisuke Nagao, Mikio Konno, Sergiy Mamykin, Andriy Dmytruk, Motohiro Takeda, Noriaki Ohuchi

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Silica-coated gold (Au) nanoparticles were prepared and their morphological and X-ray absorption properties were investigated. These core-shell type nanoparticles are very stable in aqueous media and may be suitable for an X-ray contrast agent in biological systems. Transmission electron micrographs confirmed well-separated and relatively homogeneous morphology of the nanoparticles in highly concentrated colloids. Peak position for Au plasmon resonance was red-shifted with increasing shell thickness. X-ray absorption by the colloids of silica-coated Au nanoparticles was stronger than that by those of silica-coated Agl nanoparticles, a recently investigated X-ray contrast agent, at similar experimental conditions.

Original languageEnglish
Pages (from-to)3503-3506
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Issue number11
Publication statusPublished - 2006 Nov


  • Contrast agent
  • Core-shell
  • Gold
  • Nanoparticles
  • Silica
  • X-ray absorption


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