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Synthesis of Ag and AgI Quantum Dots in AOT-Stabilized Water-in-CO_2 Microemulsions

机译:AOT稳定的水包CO_2微乳液中Ag和AgI量子点的合成

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Silver and silver iodide nano-crystals have been synthesized in the water-in-CO_2 reverse microemulsions formed by the commonly used surfactant,sodium bis(2-ethylhexyl)sulfosuc-cinate (AOT),in the presence of 2,2,3,3,4,4,5,5-octafluoro-l -pentanol as cosurfactant.The nanometer-sized aqueous domains in the microemulsion cores not only act as nanoreactors,but the surfactant interfacial monolayer also helps the stabilization of the metal and semiconductor nanoparticles.The transmission electron microscopy results show that silver and silver iodide nanocrystals with average diameters of 6.0 nm (standard deviation,SD = 1.3 nm) and 5.7 nm (SD = 1.4 nm),respectively,were formed.The results indicate that the method can be utilized as a general and economically viable approach for the synthesis of metal and semiconductor quantum dots in environmentally benign supercritical carbon dioxide.
机译:银和碘化银纳米晶体是在常用的表面活性剂双(2-乙基己基)磺基硫酸钠(AOT)在2,2,3的存在下形成的水包CO_2反相微乳液中合成的。 3,4,4,5,5-八氟-1-戊醇作为助表面活性剂。微乳液核心中的纳米级水域不仅充当纳米反应器,而且表面活性剂界面单层还有助于稳定金属和半导体纳米颗粒。透射电子显微镜结果表明,分别形成了平均直径为6.0 nm(标准偏差,SD = 1.3 nm)和5.7 nm(SD = 1.4 nm)的银和碘化银纳米晶体。用作在环境友好的超临界二氧化碳中合成金属和半导体量子点的一般且经济可行的方法。

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