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Continuous Synthesis of Monodisperse Ag Nanocubes

机译：连续合成MonodiSperse Ag Nanocubes

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2018/cgdefu.2018.18.issue-1/acs.cgd.7b00935/20171227/images/medium/cg-2017-00935n_0007.gif">The precise control of both the size and shape of Ag nanoparticles strongly influences their optical properties. Although the synthesis of Ag nanocubes with sharp corners and edges has been demonstrated, the ability to scale these approaches with high selectivity remains elusive. In this study, a continuous flow microwave-assisted reactor was used to separate nucleation from growth events, which provides a method to synthesize very uniform single crystalline Ag nanocubes. Nucleation in the microwave zone was enhanced through seed-mediated processes by sulfide formation, and a chemical regulator was used in the growth zone to further improve the sharpness of the edges of the nanocubes. Transmission electron microscopy and optical properties were used to optimize the reaction conditions and Ag nanocubes with edge lengths of 28 and 45 nm were readily synthesized with narrow particle size distributions and high selectivities (>70%). Nanocubes with 28 nm edge lengths were used to prepare films to demonstrate the detection of Rhodamine 6G with concentrations down to 10 nM using surface enhanced Raman spectroscopy. These results indicate that continuous flow approaches have the potential to produce large quantities of uniform Ag nanocubes that can be used for sensing or other applications.
机译：src =“http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2018/cgdefu.2018.18.issue-1/acs.cgd.7b00935/20171227/images/medium /cg-2017-00935n_0007.gif"> Ag纳米粒子的尺寸和形状的精确控制强烈影响它们的光学性质。虽然已经证明了具有尖角和边缘的Ag纳米孔的合成，但具有高选择性的这些方法的能力仍然难以捉摸。在该研究中，使用连续流动微波辅助反应器从生长事件中分离成核，这提供了合成非常均匀的单晶Ag纳米烯的方法。通过硫化物形成通过种子介导的方法增强微波区中的成核，并且在生长区中使用化学调节剂以进一步改善纳米孔边缘的锐度。透射电子显微镜和光学性质用于优化反应条件，并且具有边缘长度为28和45nm的Ag纳米，易于粒径分布和高选择性（> 70％）。使用28nm边缘长度的纳米孔用于制备薄膜，以证明使用表面增强的拉曼光谱法通过浓度降至10nm的罗丹明6g检测。这些结果表明，连续流动方法具有产生可用于感测或其他应用的大量均匀Ag纳米孔。

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  • 来源
    《Crystal growth & design》 |2018年第1期|共7页
  • 作者

    Gustavo H. Albuquerque; Kenneth Squire; Alan X. Wang; Gregory S. Herman;

  • 作者单位

    School of Chemical Biological and Environmental Engineering and School of Electrical Engineering and Computer Science Oregon State University Corvallis Oregon 97331 United States;

    School of Chemical Biological and Environmental Engineering and School of Electrical Engineering and Computer Science Oregon State University Corvallis Oregon 97331 United States;

    School of Chemical Biological and Environmental Engineering and School of Electrical Engineering and Computer Science Oregon State University Corvallis Oregon 97331 United States;

    School of Chemical Biological and Environmental Engineering and School of Electrical Engineering and Computer Science Oregon State University Corvallis Oregon 97331 United States;

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  • 正文语种 eng
  • 中图分类 晶体学;
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