乙酸和二氯乙烷对硫化铅纳米粒子的刻蚀
Sculpting of lead sulfide nanoparticles by means of acetic acid and dichloroethane
摘要：
胶体硫化铅是一种多用途材料，具有很大的机会通过电子限制来调整带隙，并使光学和电学性质适应目标应用。我们提出了一种新的和简单的合成路线来控制PbS纳米粒子的尺寸和形状。增加浓度的明确添加的乙酸用于调整PbS纳米粒子的形状从准球形粒子通过八面体到六臂星。醋酸盐的存在改变了不同晶面的固有表面能，并使沿该方向的生长成为可能<100>。此外，1，2-二氯乙烷的存在改变了反应动力学，这导致具有较窄尺寸分布的较小纳米颗粒。
英文摘要：
Colloidal lead sulfide is a versatile material with great opportunities to tune the bandgap by electronic confinement and to adapt the optical and electrical properties to the target application. We present a new and simple synthetic route to control size and shape of PbS nanoparticles. Increasing concentrations of explicitly added acetic acid are used to tune the shape of PbS nanoparticles from quasi-spherical particles via octahedrons to six-armed stars. The presence of acetate changes the intrinsic surface energies of the different crystal facets and enables the growth along the <100> direction. Furthermore, the presence of 1,2-dichloroethane alters the reaction kinetics, which results in smaller nanoparticles with a narrower size distribution.
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