1. Synthesis of Co–Organosilane–AuNanocompositesvia a Controlled Interphasic Reduction.
- Author
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Ojea-Jiménez, Isaac, Lorenzo, Julia, Rebled, JoséM., Sendra, Judith, Arbiol, Jordi, and Puntes, Victor
- Subjects
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SYNTHESIS of Nanocomposite materials , *SILANE compounds , *COBALT compounds , *GOLD coatings , *STABILIZING agents , *TRANSMISSION electron microscopy - Abstract
Au-coated magnetic-core nanocomposites with diametersof ∼100nm were synthesized by the biphasic reduction of Au3+ontothe surface of organosilane-stabilized Co nanoparticles of ∼12nm in diameter via an iterative gold reduction. The shell consistsinitially of Au seeds of ∼3 nm in diameter, which can be latergrown to form partially fused ∼6 nm Au NPs. A detailed investigationby transmission electron microscopy, scanning electron microscopy,UV–vis, dynamic light scattering, ζ-potential, X-raydiffraction, inductively coupled plasma mass spectrometry, and superconductingquantum interference device magnetometry was performed in order toelucidate the morphology and properties of these nanocomposites. Thesenovel nanoarchitectures, which could be transferred into aqueous phaseby means of an amphiphilic polymer, showed low cytotoxicity on humanHepG2 cells and presented relaxivity in MRI contrast enhancement experiments. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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