Sonochemical formation of gold sols
Sonochemical formation of gold sols
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DOI：
10.1021/la020276f
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发表时间：
2002-10-15
期刊：
影响因子：
3.9
通讯作者：
Grieser, F
中科院分区：
文献类型：
--
作者：
Caruso, RA;Ashokkumar, M;Grieser, F
在脂肪醇和十二烷基硫酸钠的存在下，在水溶液中，使用20 kHz的超声波AuCl 4-胶体金的还原。AuCl 4-的还原程度被认为是直接依赖于所使用的溶质的气-液界面活性。所产生的金胶体的直径在9 - 25 nm的尺寸范围内。颗粒大小取决于溶液中的醇浓度和醇的疏水性。对于特定的醇浓度，获得的颗粒越小，醇的疏水性越大。一个详细的机制，描述了整体声化学引发的减少AuCl 4-导致胶体金的形成。
The reduction of AuCl4- to colloidal gold in the presence of aliphatic alcohols and sodium dodecyl sulfate in aqueous solutions using 20 kHz ultrasound is described. The extent of reduction of AuCl4- was found to be directly dependent on the gas-solution interfacial activity of the solutes used. The diameters of the gold colloids produced were in the size range of 9-25 nm. The particle size was dependent on the alcohol concentration in solution and on the hydrophobicity of the alcohol. For a particular alcohol concentration, smaller particles were obtained the greater the hydrophobicity of the alcohol. A detailed mechanism is presented that describes the overall sonochemically initiated reduction of AuCl4- leading to the formation of colloidal gold.