Effects of intermicellar exchange rate on the formation of silver nanoparticles in reverse microemulsions of AOT
Effects of intermicellar exchange rate on the formation of silver nanoparticles in reverse microemulsions of AOT
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DOI：
10.1021/la980248q
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发表时间：
2000-02-08
期刊：
影响因子：
3.9
通讯作者：
Khilar, KC
中科院分区：
文献类型：
--
作者：
Bagwe, RP;Khilar, KC
我们报道了胶束间交换速率对AOT反胶束中合成的银纳米粒子的吸收光谱和粒径的影响。银纳米粒子是通过两个微乳液混合的方法制备的，一个微乳液含有硝酸银，另一个含有硼氢化钠。改变有机溶剂、表面活性剂(SDS、NP-5和DTAB)和有机添加剂(苯甲醇和甲苯)可以改变胶束间交换速率。胶束间交换率越高，颗粒越小，吸收光谱越蓝移。观察到了一个有趣的和潜在的有用的效果，即添加少量的非离子表面活性剂显著减小了颗粒尺寸。
We report the effects of intermicellar exchange rate on absorption spectra and particle size of silver nanoparticles synthesized in reverse micelles of AOT. The silver nanoparticles are prepared by the method of mixing of two microemulsions, one containing the silver nitrate and the other containing sodium borohydride. The intermicellar exchange rate is varied by changing the organic solvent, surfactant (SDS, NP-5, and DTAB), and organic (benzyl alcohol and toluene) additives. The higher intermicellar exchange rate is found to give smaller particle size and blue shift in the absorption spectra. An interesting and potentially useful effect has been observed in that addition of a small amount of a nonionic surfactant significantly reduces the particle size.