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Amine-terminated TEG-derived PAMAM dendrimer
as template for preparation of gold nanoparticles in water |
| Jiang-Yu WU,Yan LI,Yong MAO,Jia XU,Xu ZHOU, |
| School of Materials
Science and Engineering, Wuhan Institute of Technology, Wuhan 430073,
China; |
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Abstract Nano-sized monodisperse gold particles (AuNPs) have received significant attention in the past decade, due to their unique physical properties and good chemical stability, which can lead to a wide variety of potential applications. In this work, TEG-derived PAMAM dendrimers with amine-terminating groups were synthesized and characterized by 1H NMR and FT-IR. These dendrimers were investigated as the templates for preparation of gold nanoparticles through the reduction of HAuCl4 by NaBH4 in water. Stable gold nanoparticles with diameters around 10 nm were obtained in the presence of G2.0 – G5.0 dendrimers and characterized by UV-Vis spectroscopy, transmission electron microscopy (TEM) and dynamic light scattering (DLS). The particle size of the produced AuNPs decreased with increasing dendrimer generations. A dendrimer of higher generation has a rigid structure with many end groups on the surface and may play a powerful role in the growth of the AuNPs, as well as having a solid stabilization effect on the AuNPs.
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| Keywords
gold nanoparticles
polyamidoamine (PAMAM) dendrimer
triethylene glycol (TEG)
interaction
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Issue Date: 05 March 2010
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