A simple and effective route for the synthesis of crystalline silver nanorods and nanowires
A simple and effective route for the synthesis of crystalline silver nanorods and nanowires
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DOI：
10.1002/adfm.200304421
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发表时间：
2004-02-01
影响因子：
19
通讯作者：
Tian, ZQ
中科院分区：
文献类型：
--
作者：
Hu, JQ;Chen, Q;Tian, ZQ
提出了一种简单有效的水相合成晶态银纳米棒和纳米线的方法，利用该方法可以有效地控制它们的直径和纵横比。该合成涉及无模板和无种子的高质量纳米颗粒过程，该过程成本低，在中等温度下进行。在十二烷基磺酸钠存在下，柠檬酸三钠还原硝酸银，合成了纳米棒和纳米线。柠檬酸三钠的浓度对产物的粒径和长径比的控制起关键作用，而十二烷基磺酸钠作为封端剂对产物的粒径和长径比的控制起辅助作用。高分辨透射电子显微镜（HRTEM）和选区电子衍射（SAED）的研究表明，银纳米晶体产生的孪晶结构。我们还提出了一个初步的实验模型，以揭示其生长机制。
A simple and effective approach to the aqueous phase synthesis of crystalline silver nanorods and nanowires is demonstrated, using which their diameters and spect ratios can be effectively controlled. The synthesis involves a template-less and non-seed process to high-quality nanoparticles, which is low-cost and proceeds at moderate temperatures. The nanorods and nanowires were synthesized by the reduction of silver nitrate with tri-sodium citrate in the presence of sodium dodecylsulfonate. The concentration of tri-sodium citrate plays a critical role while sodium dodecylsulfonate, as a capping agent, only plays an assistant role in controlling the diameters and aspect rations of the products. High-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED) investigations show that the silver nanocrystals are generated with a twinned crystalline structure. We also put forward a primary experimental model to shed light on their growth mechanisms.