Rapid controllable high-concentration synthesis and mutual attachment of silver nanowires
Rapid controllable high-concentration synthesis and mutual attachment of silver nanowires
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DOI：
10.1039/c2ra01162j
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发表时间：
2012-01-01
期刊：
影响因子：
3.9
通讯作者：
Li, Robert K. Y.
中科院分区：
文献类型：
--
作者：
Hu, Mingjun;Gao, Jiefeng;Li, Robert K. Y.
提出了一种精心设计的基于两步注射溶液的新方法，可以快速制备克级均匀的银纳米线。可以高产率合成具有不同且可控长径比的均匀银纳米线。由于AgNO3浓度高，化学反应速率高，银纳米线的整个合成过程很快，可以控制在20分钟之内。研究了在这种高浓度合成中不同实验参数对银纳米产品形貌的影响。结果发现，适量Cl-离子的添加对银纳米线的形成和长径比有显着影响。还研究了溶液体积效应。结果表明，我们的合成方法非常有利于在大溶液体积中合成银纳米线。基于新颖的实验现象，提出了银纳米线的合理形成机制。观察到银纳米线的相互附着，发现银纳米线的这种高浓度合成中发挥着重要作用。这种简便、可规模化的银纳米线制备方法可以大大降低合成成本，拓宽银纳米线的研究和应用领域。
A new well-designed two-step injection solution-based method has been proposed to rapidly prepare uniform silver nanowires on a gram-scale. Uniform silver nanowires with different and controllable aspect ratios can be synthesized in high yields. Due to a high chemical reaction rate arising from high AgNO3 concentration, the whole synthetic process of the silver nanowires is rapid and can be controlled within 20 min. The influences of different experimental parameters on the morphologies of silver nanoproducts in such a high-concentration synthesis were investigated. It was found that the addition of an appropriate amount of Cl- ions had significant impact on the formation and the aspect ratios of the silver nanowires. Solution volume effect was also studied. It was shown that our synthetic method strongly favours the synthesis of silver nanowires in large solution volumes. A reasonable formation mechanism of the silver nanowires was put forward based on novel experimental phenomena. The mutual attachment of silver nanowires was observed and was found to play an important role in such high-concentration synthesis of silver nanowires. This facile scalable preparation method of silver nanowires can decrease the synthetic cost greatly and broaden the research and application areas of silver nanowires.