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首页> 外文期刊>Chemistry: A European journal >The Structure-Controlling Solventless Synthesis and Optical Properties of Uniform Cu2S Nanodisks
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The Structure-Controlling Solventless Synthesis and Optical Properties of Uniform Cu2S Nanodisks

机译：均匀Cu2S纳米盘的结构控制无溶剂合成和光学性质

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摘要

Uniform Cu2S nanodisks have been synthesized from a well-characterized layered copper thiolate precursor by structure-controlling solventless thermolysis at 200-220 degrees C under a N-2 atmosphere. The development from small Cu2S nanoparticles (diameter approximate to 3 nm) to nanodisks (diameter 8.3 nm) and then to faceted nanodisks (diameter 27.5 nm, thickness 12.7 nm) is accompanied by a continuous phase transition from metastable orthorhombic to monoclinic Cu2S, the ripening of small particles by aggregation, and finally the crystallization process. The growth of the nanoproduct is constrained by the crystal structure of the precursor and the in situ-generated thiol molecules. Such controlled anisotropic growth leads to a nearly constant thickness of faceted nanodisks with different diameters, which has been confirmed by TEM observations and optical absorption measurements.
机译：通过在N-2气氛下在200-220摄氏度下控制结构的无溶剂热解，从表征充分的层状硫醇铜前体合成了均匀的Cu2S纳米盘。从小的Cu2S纳米颗粒（直径约3 nm）到纳米盘（直径8.3 nm）然后到刻面纳米盘（直径27.5 nm，厚度12.7 nm）的发展，伴随着从亚稳态正交晶体到单斜晶Cu2S的连续相变，成熟聚集的小颗粒，最后是结晶过程。纳米产物的生长受到前体的晶体结构和原位生成的硫醇分子的限制。这种受控的各向异性生长导致具有不同直径的多面纳米磁盘的厚度几乎恒定，这已通过TEM观察和光吸收测量得到证实。

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