Gelation Effect on the Synthesis of High-aspect-ratio Gold Nanorods
Gelation Effect on the Synthesis of High-aspect-ratio Gold Nanorods
复制标题
凝胶化效应对高长径比金纳米棒合成的影响
DOI：
10.1166/jnn.2012.5405
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Hara
中科院分区：
文献类型：
--
作者：
Y. Takenaka;H. Kitahata;N. L. Yamada;H.Seto;M. Hara
研究了表面活性剂凝胶溶液中高长径比金纳米棒的生长过程。对于金纳米棒的应用，表面等离子体是非常有用的，其吸收取决于它们的纵横比。因此，高产率地合成具有良好长径比的金纳米棒是非常重要的。然而，对于较短的纳米棒（纵横比为1.30），生长机制尚未得到很好的理解，尽管已经知道高纵横比的金纳米棒可以在凝胶化的表面活性剂溶液中以高产率合成。本文研究了表面活性剂生长溶液的凝胶化与高长径比金纳米棒生长过程的关系。小角X射线散射（SAXS）揭示了凝胶化的微观特征，即表面活性剂分子自组装从胶束到层状的结构转变。这些结果将有助于更好地理解高长径比金纳米棒的生长机制。
The growth process of high-aspect-ratio gold nanorods in gelled surfactant solution was studied. As for the application of gold nanorods, the surface plasmon is quite useful, whose absorption depends on their aspect ratio. Hence it is important to synthesize gold nanorods with favorable aspect ratio in high yield. For shorter nanorods (aspect ratio ∼30), however, the growth mechanism has not yet been understood well, although it has been known that the high-aspect-ratio gold nanorods could be synthesized in high yield in gelled surfactant solution. In this paper, we studied the relationship between the growth process of high-aspect-ratio gold nanorods and the gelation of surfactant growth-solution. Small angle X-ray scattering (SAXS) revealed the microscopic feature of gelation as the structural transition of self-assembly of surfactant molecules from micellar to lamellar. These results will be helpful for better understanding on the growth mechanism of high-aspect-ratio gold nanorods.