Chen Yu-Biao, Chen Ling, Wu Li-Ming
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Chemistry. 2008;14(35):11069-75. doi: 10.1002/chem.200801447.
Uniform Cu(2)S 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 Cu(2)S nanoparticles (diameter approximately 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 Cu(2)S, 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.
通过在氮气气氛下于200 - 220摄氏度进行结构控制的无溶剂热解，从一种特征明确的层状硫醇铜前驱体合成了均匀的Cu₂S纳米盘。从小的Cu₂S纳米颗粒（直径约3纳米）发展到纳米盘（直径8.3纳米），再到多面纳米盘（直径27.5纳米，厚度12.7纳米），伴随着从亚稳正交晶系到单斜晶系Cu₂S的连续相变、小颗粒通过聚集的熟化以及最后的结晶过程。纳米产物的生长受到前驱体的晶体结构和原位生成的硫醇分子的限制。这种可控的各向异性生长导致不同直径的多面纳米盘具有近乎恒定的厚度，这已通过透射电子显微镜观察和光吸收测量得到证实。
