Controlling the Size, Morphology, and Aspect Ratio of Nanostructures Using Reverse Micelles: A Case Study of Copper Oxalate Monohydrate
Controlling the Size, Morphology, and Aspect Ratio of Nanostructures Using Reverse Micelles: A Case Study of Copper Oxalate Monohydrate
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DOI：
10.1021/la900063q
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发表时间：
2009-06-02
期刊：
影响因子：
3.9
通讯作者：
Ganguli, Ashok K.
中科院分区：
文献类型：
--
作者：
Ranjan, Rajeev;Vaidya, Sonalika;Ganguli, Ashok K.
本研究的重点是了解使用反胶束的纳米结构的生长和控制。它已较早地实现，如表面活性剂，助表面活性剂，和含水量的参数的影响使用反胶束获得的纳米结构的大小和形状。然而，缺乏一致的努力来了解这些因素对特定纳米材料生长的作用。在这项研究中，我们专注于一种纳米材料（草酸铜一水合物），并确定上述因素如何控制这些纳米结构的大小，形状，纵横比和生长。结果表明，阳离子表面活性剂（CTAB，TTAB和CPB）有利于草酸铜纳米棒的形成。这些棒的纵横比可以被控制，以获得纳米立方体（类似于80-100 nm）和纳米粒子（类似于8-10 nm）在CTAB系统中使用较长链的助表面活性剂，如1-辛醇和1-癸醇，分别。分别使用非离子表面活性剂Triton X-100和Tergitol获得类似于50-60和类似于60-80 nm的纳米立方体。纳米结构的尺寸也可以通过使用基于非离子（Triton X-100）的反胶束系统改变水与表面活性剂（W-0）的摩尔比来控制。该研究支持的多功能性的微乳液方法，以实现各种纳米结构的一水草酸铜。我们的研究结果将有助于将这些想法扩展到其他纳米材料。
This study focuses on understanding the growth and control of nanostructures using reverse micelles. It has been earlier realized that parameters like surfactant, cosurfactant, and aqueous content influence the size and shape of the nanostructures obtained using reverse micelles. However, a concerted effort to understand the role of these factors on the growth of a specific nanomaterial is missing. In this study we have focused on one nanomaterial (copper oxalate monohydrate) and determined how the above-mentioned factors control the size, shape, aspect ratio, and growth of these nanostructures. Our results show that cationic surfactants (CTAB, TTAB, and CPB) favor the formation of nanorods of copper oxalate. The aspect ratio of these rods could be controlled to obtain nanocubes (similar to 80-100 nm) and nanoparticles (similar to 8-10 nm) in the CTAB system using longer chain cosurfactants like I-octanol and 1-decanol, respectively. Nanocubes of similar to 50-60 and similar to 60-80 nm were obtained using nonionic surfactants Triton X-100 and Tergitol, respectively. The size of the nanostructures could also be controlled by varying the molar ratio of water to surfactant (W-0) by using a nonionic (Triton X-100)-based reverse micellar system. The study espouses the versatility of the microemulsion method to realize a variety of nanostructures of copper oxalate monohydrate. Our results will be of use in extending these ideas to other nanomaterials.