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Convenient, rapid synthesis of silver nanocubes and nanowires via a microwave-assisted polyol method

机译：通过微波辅助多元醇方法方便，快速地合成银纳米立方体和纳米线

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Silver nanostructures have been synthesized via a microwave-assisted polyol method by adding sodium sulfide (Na2S) into the solution. An interesting morphology evolution can be observed by adjusting the concentration of Na2S and the heating power. It is found that the ideal concentration of Na2S is 31.25-500 mu M for the fast reduction of Ag+ at 300 W under optimal conditions for producing monodispersed silver nanocubes. When the heating power is increased to 400 W, 62.5-250 mu M is the ideal concentration of Na2S for the synthesis of silver nanocubes. On increasing the concentration of Na2S (>500 mu M), a mixture of silver nanowires, nanocubes, bipyramids, and irregular/quasispherical particles is synthesized at 300 and 400 W. In particular, an increase in the concentration of Na2S to 750 mu M at 400 W leads to the production of a quantity of silver nanowires. In addition, silver nanocubes with controllable sizes can be obtained by changing the concentration of Na2S and the heating power. Compared to traditional wet-chemical methods, this method has the advantage of a marked decrease in reaction time to 3.5 min. Finally, our work provides a simple strategy for fabricating silver nanostructures with controllable morphologies and sizes.
机译：银纳米结构已经通过微波辅助多元醇方法通过向溶液中添加硫化钠（Na2S）来合成。通过调节Na2S的浓度和加热功率，可以观察到有趣的形态演变。发现在制备单分散银纳米立方体的最佳条件下，在300 W下快速还原Ag +的理想Na2S浓度为31.25-500μM。当加热功率增加到400 W时，Na 2 S的理想浓度是62.5-250μM，这是合成银纳米立方体的理想浓度。随着Na2S（> 500μM）浓度的增加，在300和400 W下合成了银纳米线，纳米立方体，双锥体和不规则/准球形颗粒的混合物。特别是，Na2S浓度增加到750μM在400 W的功率下会产生大量的银纳米线。另外，通过改变Na 2 S的浓度和加热功率，可以获得尺寸可控的银纳米立方体。与传统的湿化学方法相比，该方法的优势是反应时间显着减少至3.5分钟。最后，我们的工作为制造具有可控形态和尺寸的银纳米结构提供了一种简单的策略。

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