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J Nanopart Res (2010) 12:21632177 DOI 10.1007/s11051-009-9780-1
RESEARCH PAPER
Silver nanoparticles obtained with a glucose modied siloxane surfactant
Carmen Racles Anton Airinei Iuliana Stoica
Aurelia Ioanid
Received: 17 June 2009 / Accepted: 1 October 2009 / Published online: 14 October 2009 Springer Science+Business Media B.V. 2009
Abstract Silver nanoparticles were obtained in aqueous medium, at room temperature, by redox reactions, with or without glucose, in the presence of a glucose-containing cyclosiloxane. The siloxane surfactant can act as stabilizer when glucose is present in the system, but also as reducing agent and stabilizer when no glucose is added. The kinetics was followed by absorption UVVis spectroscopy, and different behaviors were found for the two versions of the redox process: rst-order kinetics for the reaction with glucose and a much slower complex reaction with three zero-order steps when no glucose was added. The reactions were also investigated with IR absorption spectroscopy. The resulting nanoparticles were analyzed by dynamic light scattering (DLS), atomic force microscopy (AFM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) analysis, and transmision electron microscopy (TEM). All data showed evidence for the formation of silver spherical nanoparticles, with an average diameter of 14 nm (reaction with glucose) and 6.5 nm (reaction without glucose), respectively.
Keywords Silver nanoparticles
Siloxane surfactant Redox reaction
UVVis AFM Semiconductor nanoparticles
Introduction
There is an increasing interest for the preparation and study of nanosized metal and semiconductor particles, due to their unique electronic, optical, and catalytic properties. It is interesting how noble metals, which are not active in their bulk state, can act as efcient catalysts when they are reduced to nanometer size (Prasad et al. 2003; Granot et al. 2005; Thompson 2007; Hvolbk et al. 2007; Peng et al. 2008).
Noble metal nanoparticles have been prepared in the last years, especially for biomedical, analytical, and bio-analytical purposes (Elechiguerra et al. 2005; Sioss et al. 2007; Yang et al. 2008; Hou et al. 2007; Huang et al. 2009; Crespilho et al. 2009). Among these nanomaterials, silver nanoparticles have received considerable attention due to their attractive physico-chemical properties, like the surface plasmon resonance, surface-enhanced Raman scattering (SERS), or antibacterial activity, which can be exploited for promissing applications (Haes et al. 2004; Sondi and Salopek-Sondi 2004; Burt et al. 2004; Xu et...