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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Size-tunable synthesis of high-quality gold nanorods under basic conditions by using H2O2 as the reducing agent
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Size-tunable synthesis of high-quality gold nanorods under basic conditions by using H2O2 as the reducing agent

机译：以H2O2为还原剂在碱性条件下可调谐合成高质量金纳米棒

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摘要

We report a novel method for wet synthesis of gold nanorods (GNRs) with H2O2 as the reducing agent. Our method filled the gap of synthesizing GNRs under basic conditions through a seed-mediated method. The XRD data and H RTEM image show that GN Rs have face-centered cubic structures and the growth of GN Rs is along the [001] direction. Moreover, we investigated the impacts on GNR synthesis through changing the experimental parameters, including the added amounts of NaOH, the H2O2/Au~(3+) ratio, and the concentration of AgNO3, by UV-Vis spectroscopy and TEM. It is found that the longitudinal localized surface plasmon resonance peak of GNRs can be easily tuned and the maximum of 981 nm can be achieved. The GNRs prepared by our method have well-controlled morphology, high purity and improved monodispersity. The quality of GNRs is no longer sensitive to the concentration of the reducing agent, and excellent GNRs can be prepared even when the H2O2/Au~(3+) ratio is adjusted to 300 :1. This new GNR preparation method provides an approach to obtain high-quality GNRs with different sizes, which is expected to find wide applications in various fields, especially those requiring basic conditions.
机译：我们报告了一种以H2O2为还原剂湿法合成金纳米棒（GNRs）的新方法。我们的方法填补了在基本条件下通过种子介导的方法合成GNR的空白。 XRD数据和H RTEM图像显示GN Rs具有面心立方结构，并且GN Rs的生长沿[001]方向。此外，我们通过紫外-可见光谱和TEM改变了实验参数，包括NaOH的添加量，H2O2 / Au〜（3+）的比例和AgNO3的浓度，研究了对GNR合成的影响。发现可以很容易地调谐GNR的纵向局部表面等离子体激元共振峰，并且可以达到最大981nm。通过我们的方法制备的GNR具有良好的形态控制，高纯度和改进的单分散性。 GNR的质量不再对还原剂的浓度敏感，即使将H2O2 / Au〜（3+）的比例调整为300：1，也可以制备出优异的GNR。这种新的GNR制备方法提供了一种获得大小不同的高质量GNR的方法，有望在各个领域中找到广泛的应用，尤其是那些需要基本条件的领域。

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