High Yield Synthesis of Pure Alkanethiolate-Capped Silver Nanoparticles

详细信息    查看全文

• 作者：Alessandra Mari ; Patrizia Imperatori ; Giada Marchegiani ; Luciano Pilloni ; Alessio Mezzi ; Saulius Kaciulis ; Carla Cannas ; Carlo Meneghini ; Settimio Mobilio ; Lorenza Suber
• 刊名：Langmuir
• 出版年：2010
• 出版时间：October 5, 2010
• 年：2010
• 卷：26
• 期：19
• 页码：15561-15566
• 全文大小：888K
• 年卷期：v.26,no.19(October 5, 2010)
• ISSN：1520-5827

文摘

One-phase, one-pot synthesis of Ag⁰ nanoparticles capped with alkanethiolate molecules has been optimized to easily achieve a pure product in quantitative yield. We report the synthesis of dodecanethiolate-capped silver particles and the chemophysical, structural, and morphologic characterization performed by way of UV−vis, ¹H NMR, and X-ray photoelectron (XPS) spectroscopies, X-ray powder diffraction (XRD) and X-ray absorption fine structure analysis (XFAS), electron diffraction and high-resolution transmission electron microscopy (HR-TEM), and scanning and transmission electron microscopy (SEM and TEM). Depending on the molar ratio of the reagents (dodecylthiosulphate/Ag⁺), the mean Ag⁰ particle size D_XRD is tuned from 4 to 3 nm with a narrow size distribution. The particles are highly soluble, very stable in organic solvents (hexane, toluene, dichloromethane, etc.), and resistant to oxidation; the hexane solution after one year at room temperature does not show any precipitation or formation of oxidation byproducts.