Shape-controlled synthesis of hybrid nanomaterials via three-dimensional hydrodynamic focusing.
Shape-controlled synthesis of hybrid nanomaterials via three-dimensional hydrodynamic focusing.
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DOI：
10.1021/nn502549v
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发表时间：
2014-10-28
期刊：
影响因子：
17.1
通讯作者：
Huang, Tony Jun
中科院分区：
文献类型：
--
作者：
Lu, Mengqian;Yang, Shikuan;Ho, Yi-Ping;Grigsby, Christopher L.;Leong, Kam W.;Huang, Tony Jun
通过一种简单、连续、低成本的方法来控制形状合成纳米材料是纳米材料研究走向实际应用的关键。水动力聚焦技术以其简单、低成本和对反应条件的精确控制等优点，已被用于纳米材料的合成。虽然大多数研究都集中在提高均匀性和尺寸控制上，但很少有人解决了调整合成纳米材料形状的潜力。本文介绍了一种利用三维水动力聚焦（3D-HF）合成杂化材料的简便方法。在保持试剂流速不变，仅改变缓冲溶液流速的情况下，反应区内两种反应物（即四硫代戊烯（TTF）和HAuCl4）的摩尔比会发生变化。合成的TTF-Au杂化材料具有非常不同的和可预测的形态。通过计算模拟研究了不同缓冲流速下的反应条件，并探讨了不同结构的形成机理。这种简单的一步法实现了连续形状可调合成，突出了3D-HF在纳米材料研究中的潜力。
Shape-controlled synthesis of nanomaterials through a simple, continuous, and low-cost method is essential to nanomaterials research toward practical applications. Hydrodynamic focusing, with its advantages of simplicity, low-cost, and precise control over reaction conditions, has been used for nanomaterial synthesis. While most studies have focused on improving the uniformity and size control, few have addressed the potential of tuning the shape of the synthesized nanomaterials. Here we demonstrate a facile method to synthesize hybrid materials by three-dimensional hydrodynamic focusing (3D-HF). While keeping the flow rates of the reagents constant and changing only the flow rate of the buffer solution, the molar ratio of two reactants (i.e., tetrathiafulvalene (TTF) and HAuCl4) within the reaction zone varies. The synthesized TTF–Au hybrid materials possess very different and predictable morphologies. The reaction conditions at different buffer flow rates are studied through computational simulation, and the formation mechanisms of different structures are discussed. This simple one-step method to achieve continuous shape-tunable synthesis highlights the potential of 3D-HF in nanomaterials research.
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