从点到条再到片-硫化铅纳米结构的形状控制
From dots to stripes to sheets - Shape control of lead sulfide nanostructures
摘要：
控制纳米结构中的各向异性是一项具有挑战性但有益的任务，因为在一个或多个维度中的限制决定性地影响物品的物理和化学性质。特别是，半导体纳米结构可以被定制以获得优化的特性，以作为太阳能电池中的晶体管或吸收材料。我们证明了胶体硫化铅纳米结构的形状可以通过前体浓度、氯代烷烃共配体的浓度和合成温度从球形到条带再到片状进行调节。所有的最终结构仍然具有至少一个限制的维度。电输运测量补充了研究结果。
英文摘要：
Controlling anisotropy in nanostructures is a challenging but rewarding task since confinement in one or more dimensions influences the physical and chemical properties of the items decisively. In particular, semiconducting nanostructures can be tailored to gain optimized properties to work as transistors or absorber material in solar cells. We demonstrate that the shape of colloidal lead sulfide nanostructures can be tuned from spheres to stripes to sheets by means of the precursor concentrations, the concentration of a chloroalkane co-ligand and the synthesis temperature. All final structures still possess at least one dimension in confinement. Electrical transport measurements complement the findings.
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