Aqueous synthesis of alkanethiolate-protected Ag nanoparticles using bunte salts
Aqueous synthesis of alkanethiolate-protected Ag nanoparticles using bunte salts
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DOI：
10.1021/la049417z
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发表时间：
2004-08-03
期刊：
影响因子：
3.9
通讯作者：
Cutler, E
中科院分区：
文献类型：
--
作者：
Shon, YS;Cutler, E
介绍了以S十二烷基硫代硫代硫酸钠(邦特盐)为原料，在水溶液中一锅法制备单分子膜保护的金属纳米粒子的方法。采用S-十二烷基硫代硫酸盐吸附脱除SO3-部分的方法对硝酸银在水中的硼氢还原法制备纳米银进行了稳定化处理。通过对硼氢化物和硼酸盐的吸附，银溶胶的暂时稳定防止了银纳米颗粒在水中的聚集。其他金属纳米颗粒的合成，包括水中的金、铜和钯颗粒，则不太成功。在加入NaBH4后，金和铜颗粒立即完全聚集和析出，只产生不溶解的团簇。可以制备出稳定的、可溶的钯纳米粒子，但也观察到了钯-硫酸盐络合物的存在。用核磁共振氢谱、紫外-可见光谱、傅里叶变换红外光谱和透射电子显微镜对其进行了表征。
The one-pot synthesis of monolayer-protected metal nanoparticles derived from sodium S-dodecyl-thiosulfate (Bunte salt) in aqueous solution is described. Silver nanoparticles, which were produced by the borohydride reduction of silver nitrate in H2O, were stabilized by the adsorption of S-dodecylthiosulfate followed by the removal of the SO3- moiety. Temporary stabilization of silver sols by the adsorption of borohydride and borate prevented aggregation of silver nanoparticles in H2O. The syntheses of other metal nanoparticles, including gold, copper, and palladium particles in H2O, were less successful. Gold and copper particles were completely aggregated and precipitated out immediately after the addition of NaBH4, yielding only insoluble clusters. Stable and soluble palladium nanoparticle could be prepared, but the presence of Pd-thiolate complex was also observed. These nanoparticles were characterized using H-1 NMR, UV-vis spectroscopy, FT-IR spectroscopy, and transmission electron microscopy.