کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
608339 | 880580 | 2012 | 8 صفحه PDF | دانلود رایگان |
This article demonstrates that bicontinuous microemulsions are optimal templates for high yield production of metal nanoparticles. We have verified this for a variety of microemulsion systems having AOT (sodium bis (2-ethyhexyl) sulphosuccinate) or a fluorocarbon (perfluoro (4-methyl-3,6-dioxaoctane)sulphonate) as surfactant mixed with water and oils like n-heptane or n-dodecane. Several types of metal nanoparticles, including platinum, gold and iron, were produced in these microemulsions having a size range spanning 1.8 − 17 nm with a very narrow size distribution of ±1 nm. Remarkably high mass concentrations up to 3% were reached. Size and concentration of the nanoparticles could be varied with the stoichiometries of the reagents that constituted them. The optimization towards high yield while maintaining low size polydispersity is due to the decoupling of the time scales for the precipitation reaction and for coarsening. In actual fact, coalescence is essentially prevented by the immobilization of nanoparticles within the bicontinuous microemulsion structure.
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► Bicontinuous microemulsions as optimal nanoparticle templates.
► Size range = 1.8 − 17 nm with narrow distribution = ±1 nm.
► Mass yield of nanoparticles = 3% of template.
► Nanoparticle uniformity and immobilization guarantee long-term stability.
Journal: Journal of Colloid and Interface Science - Volume 372, Issue 1, 15 April 2012, Pages 16–23