State Key Laboratory of Applied Organic Chemistry (SKLAOC), Lanzhou University, Lanzhou, P R China.
Chem Asian J. 2013 May;8(5):912-8. doi: 10.1002/asia.201201154. Epub 2013 Feb 27.
PbSe semiconductor nanocrystals (NCs) have attracted ever-growing interest owing to both their fundamental physics and potential applications in a diverse range of fields such as optoelectronic devices and nonlinear optics. The current fabrication strategy for colloidal PbSe NCs, however, frequently involves acutely toxic reagents and tedious reaction procedures, and is plagued by products with poorly controlled size and morphology. Herein, we report a facile, low-cost, and phosphine-free method for synthesizing PbSe NCs, which provides highly uniform NCs with tunable mid-IR absorption, and they are promising for bio-related applications. These high quality NCs were obtained by the reaction of elemental Se and PbCl2 in oleylamine as both the ligand and reaction medium. The high flexibility and reproducibility of the method reported in this study allows us to synthesize monodispersed PbSe NCs with well-controlled size and morphology. In addition, these products show strong optical limiting effects, and thus hold potential for developing nonlinear optical devices.
硒化铅半导体纳米晶体（NCs）由于其基础物理学及其在光电设备和非线性光学等多个领域的潜在应用，引起了越来越多的关注。然而，目前胶体硒化铅 NCs 的制备策略通常涉及剧毒试剂和繁琐的反应程序，并且受到产品尺寸和形态控制不佳的困扰。在此，我们报告了一种简便、低成本且无膦的方法来合成硒化铅 NCs，该方法提供了具有可调中红外吸收的高度均匀的 NCs，它们在生物相关应用中具有广阔的前景。这些高质量的 NCs是通过元素硒和 PbCl2 在油胺中的反应获得的，油胺既是配体又是反应介质。本研究中报道的方法具有很高的灵活性和可重复性，可用于合成具有良好尺寸和形态控制的单分散硒化铅 NCs。此外，这些产物表现出很强的光限幅效应，因此在开发非线性光学器件方面具有潜力。
