Controlled synthesis of gold nanoflowers assisted by poly(vinyl pyrrolidone)-sodium dodecyl sulfate aggregations
Controlled synthesis of gold nanoflowers assisted by poly(vinyl pyrrolidone)-sodium dodecyl sulfate aggregations
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聚(乙烯基吡咯烷酮)-十二烷基硫酸钠聚集体辅助金纳米花的可控合成
DOI：
10.1016/j.colsurfa.2011.02.029
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发表时间：
2011-05-05
影响因子：
5.2
通讯作者：
Fang, Yun
中科院分区：
文献类型：
--
作者：
Ren, Yueping;Xu, Chengcheng;Fang, Yun
在聚乙烯吡咯烷酮（PVP）-十二烷基硫酸钠（SDS）聚集体的辅助下，通过一种简便的方法在水溶液中合成了高产率、尺寸单分散性好的金纳米花。在该路线中，HAuCl 4被PVP直接还原而没有任何额外的还原剂，并且添加氢氧化钠（NaOH）以诱导纳米花的形成。合成的纳米花的尺寸为100 nm，由固体核和许多短而钝的突起（5-10 nm）组成。利用紫外-可见光谱和透射电子显微镜（TEM）对纳米花的形态演化过程进行了监测，以更好地了解其形成机理。在适当的SDS浓度下，PVP-SDS聚集体的存在对于具有许多突起的典型三维（3D）纳米花的合成是必不可少的。此外，还研究了SDS、NaOH和HAuCl 4浓度对产物形貌的影响。(C)2011 Elsevier B. V.保留所有权利。
Gold nanoflowers with high-yield and good size monodispersity were synthesized in aqueous solution through a facile route under the assistance of poly(vinyl pyrrolidone) (PVP)-sodium dodecyl sulfate (SDS) aggregations. In this route, HAuCl4 was directly reduced by PVP without any additional reducing agents and sodium hydroxide (NaOH) was added to induce the formation of nanoflowers. The synthesized nanoflowers are 100 nm in dimension consisting of a solid core and many short and obtuse protrusions (5-10 nm). UV-vis spectroscopy and transmission electron microscope (TEM) were used to monitor the shape evolutionary process of the nanoflowers to get a better understanding on their formation mechanism. The presence of PVP-SDS aggregations at a proper SDS concentration was essential to the synthesis of typical three-dimensional (3D) nanoflowers with many protrusions. Moreover, the influences of SDS, NaOH and HAuCl4 concentrations on the morphology of the products were investigated in detail. (C) 2011 Elsevier B.V. All rights reserved.