Synthesis of Coinage-Metal Nanoparticles from Mesityl Precursors
An anhydrous route for the synthesis of amine-capped coinage-metal nanoparticles (NP) has been developed using coinage-metal mesityl (mesityl = 2,4,6-Me3C6H2) derivatives. Under an argon atmosphere, crystalline [Cu(μ-mesityl)]5, [Ag(μ-mesityl)]4, and [Au(μ-mesityl)]5 were readily dissolved in octyla...
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Published in | Nano letters Vol. 3; no. 7; pp. 901 - 905 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
01.07.2003
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Online Access | Get full text |
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Summary: | An anhydrous route for the synthesis of amine-capped coinage-metal nanoparticles (NP) has been developed using coinage-metal mesityl (mesityl = 2,4,6-Me3C6H2) derivatives. Under an argon atmosphere, crystalline [Cu(μ-mesityl)]5, [Ag(μ-mesityl)]4, and [Au(μ-mesityl)]5 were readily dissolved in octylamine (0.3 M solution) and subsequently injected into a heated hexadecylamine solution (300 °C), generating the corresponding metal nanoparticles. After washing with methanol and extracting with toluene, oxide-free coinage NPs were isolated and characterized by UV−vis spectroscopy and transmission electron microscopy. Under these conditions, the spherical NPs were found to be 8−9 nm in size for Cu° (no surface oxide present), 9 nm for Ag°, and 8−80 nm for Au°. Reducing the concentration of the precursor solution, the temperature of the solution, and the time of reaction led to the synthesis of Au° NPs that were 12 ± 1 nm in size. |
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ISSN: | 1530-6984 1530-6992 |
DOI: | 10.1021/nl034200v |