Phosphine-Free Synthesis from 1D Pb(OH)Cl Nanowires to OD and 1D PbSe Nanocrystals
Phosphine-Free Synthesis from 1D Pb(OH)Cl Nanowires to OD and 1D PbSe Nanocrystals
复制标题
从 1D Pb(OH)Cl 纳米线到 OD 和 1D PbSe 纳米晶体的无磷合成
DOI：
10.1021/am403361z
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发表时间：
2013-10-01
影响因子：
9.5
通讯作者：
Li, Lin Song
中科院分区：
文献类型：
--
作者：
Shen, Huaibin;Li, Jinjie;Li, Lin Song
在本文中，我们报道了一种新的无磷化氢、低成本、低温的胶体方法，在零维（0D）和一维（1D）上控制合成PbSe纳米晶体。与目前广泛使用的“热注射”法和“非前驱体注射”法不同，该方法的新颖之处在于它不需要成核过程。相反，高质量的预合成1D Pb(OH)Cl纳米线（直径约为80 ~ 160 nm）可以直接用作Pb前驱体，并与Se前驱体反应形成单分散的点状OD立方PbSe和ID正交PbSe纳米线。添加硒前驱体与Pb(OH)Cl纳米线反应后，在高温下形成OD立方PbSe纳米晶体。将反应时间延长3 h，可合成自组装良好的OD立方PbSe纳米晶体，平均直径约为15 nm。此外，该方法已被证明可以在低至110℃的温度下成功合成高质量的ID PbSe纳米线，ID PbSe纳米线的平均直径为15-24 nm，最短和最长的长度为600 ~ 5 μ m，唯一的尖峰和强峰与正交PbSe的特征峰一致，表明纳米线的延伸轴方向为[111]。和OD立方PbSe纳米晶完全转变为一维正交型PbSe纳米线。
In this paper, we report a new phosphine-free, low-cost, low-temperature colloidal method of controlled synthesis of PbSe nanocrystals in both zero-dimension (0D) and one-dimension (1D). Different from the widely used "hot injection" method and "nonprecursor injection" method, the novelty of this new method is that it does not require a nucleation process. Instead, high-quality presynthesized 1D Pb(OH)Cl nanowires (similar to 80 to similar to 160 nm in diameter) can be directly used as a Pb precursor and reacted with a Se precursor to form monodisperse dot-shaped OD cubic PbSe and ID orthorhombic PbSe nanowires. OD cubic PbSe nanocrystals begin to form at elevated temperatures after the Se precursor is added to react with Pb(OH)Cl nanowires. By prolonging the reaction time for 3 h, good self-assembled OD cubic PbSe nanocrystals can be synthesized with an average diameter of about 15 nm. Furthermore, such method has been demonstrated to synthsize high-quality ID PbSe nanowires successfully with temperature as low as 110 degrees C. ID PbSe nanowires possess a mean diameter of 15-24 nm with the shortest and longest length from 600 nm to 5 mu m. The only sharp and strong peak, which is consistent with characteristic peaks of orthorhombic PbSe, indicates that the nanowires' elongation axis is in the [111] direction, and OD cubic PbSe nanocrystals change to 1D orthorhombic PbSe nanowires completely.