Abstract
Polysulfone−silver composite nanoparticles have been prepared by combining polymer nanoprecipitation and redox synthesis of silver, in the presence of a glucose-modified cyclosiloxane as stabilizing agent. Based on previous kinetic investigations and on model reactions, we concluded that the reducing agent in this case is the tetrahydrofuran (THF) used as solvent for polysulfone. Dynamic light scattering measurements on the obtained polymer-silver composite particles indicated particle average diameter of 176 nm with a polydispersity index of 0.25. The UV–vis spectrum exhibited the silver plasmon resonance. By different microscopic methods (atomic force microscopy—AFM, high resolution transmission electron microscopy—HRTEM, and scanning electron microscopy—SEM), larger polymer particles coated with silver nanoprticles were observed. The Energy Dispersive X-Ray analysis—EDX; confirmed the presence of Ag on the surface of the particles, while the selected area electron diffraction showed single crystalline silver nanospheres with face-centered cubic structure.
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Acknowledgments
This research was financially supported by the European Regional Development Fund (SOP IEC -A2-O2.1.2-2009-2, ID 570, CODE SMIS-CSNR: 12473, Contract 129/2010-POLISILMET). The authors are grateful to Dr. Eugeniu Vasile from METAV Bucharest for HRTEM investigations and to Dr. Maria Cazacu form ICMPP for helpful discussion.
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Racles, C., Stoica, I., Doroftei, F. et al. A simple method for the preparation of colloidal polymer-supported silver nanoparticles. J Nanopart Res 13, 6971–6980 (2011). https://doi.org/10.1007/s11051-011-0608-4
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DOI: https://doi.org/10.1007/s11051-011-0608-4