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  • Title: X-ray absorption of gold nanoparticles with thin silica shell.
    Author: Park YS, Liz-Marzán LM, Kasuya A, Kobayashi Y, Nagao D, Konno M, Mamykin S, Dmytruk A, Takeda M, Ohuchi N.
    Journal: J Nanosci Nanotechnol; 2006 Nov; 6(11):3503-6. PubMed ID: 17252799.
    Abstract:
    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.
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