Encapsulation of Silver Nanoparticles into Polystyrene Microspheres

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• 作者：Amar S. Kumbhar ; George Chumanov
• 刊名：Chemistry of Materials
• 出版年：2009
• 出版时间：July 14, 2009
• 年：2009
• 卷：21
• 期：13
• 页码：2835-2839
• 全文大小：827K
• 年卷期：v.21,no.13(July 14, 2009)
• ISSN：1520-5002

文摘

Hydrogen reduction of a saturated silver(I) oxide solution at elevated temperatures in the presence of 200 nm polystyrene (PS) microspheres followed by acetone treatment lead to the encapsulation of the resulting silver nanoparticles (Ag NPs) into the PS microspheres. Extinction spectra reveal an expected red-shift of the characteristic plasmon resonance frequency of Ag−PS core−shell particles due to the increase in the surrounding dielectric constant. The Ag−PS core−shell particles maintain their stability when redispersed back into water.