12 October 2005 Fabrication of functionalized gold nanoparticles by femtosecond laser ablation in aqueous solutions of biopolymers
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Abstract
Femtosecond laser ablation of a gold plate in aqueous solutions has been used to form colloidal gold nanoparticles. Using different chemical environments during the fabrication, this method makes it possible to functionalize nanomaterials by an appropriate capping ligand. In particular, we were able to control the size and the reactivity of gold particles by using different polymers (dextran and polyethylene glycol). The size of the nanoparticles, measured by transmission electron microscopy (TEM), was found to be as low as 5 nm, in some cases. The addition of these capping agents also significantly improved the long term stability of gold particles. The produced nanoparticles exhibited a strong absorption band near 520 nm due to the surface plasmon resonance and a photoluminescence signal in the violet-blue spectral range. The functionalized nanoparticles produced are of significance in view of their bio-imaging and bio-sensing applications.
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S Besner, S Besner, A. V. Kabashin, A. V. Kabashin, M. Meunier, M. Meunier, F. M. Winnik, F. M. Winnik, } "Fabrication of functionalized gold nanoparticles by femtosecond laser ablation in aqueous solutions of biopolymers", Proc. SPIE 5969, Photonic Applications in Biosensing and Imaging, 59690B (12 October 2005); doi: 10.1117/12.628885; https://doi.org/10.1117/12.628885
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