The enantiomeric excess phenomenon in spontaneous chiral symmetry breaking (SCSB) is a crucial issue in the origin of homochirality in nature, whereas chiral inorganic compounds have long been reckoned as racemates. Here, we report the SCSB in the self-assembly of cadmium chalcogenide nanorods, leading to chiral biases away from the racemate. In the presence of achiral organics, helical CdSe@CdS nanorods (HCCNs) with unidirectionally rotated crystal lattices along the rod axis were stochastically formed on the epitaxial interface of the {111}_cub/{0001}_hex planes. The stability of helical dislocation structures, as supported by a theoretical analysis of their binding energies, suggested the possibility of the emergence of helical structures in an achiral environment. Hierarchical chiral films induced by simple solvent evaporation self-assembly of HCCNs exhibited spontaneous enantiomeric excess between batches, which was speculated to be originated from the enantiomeric excess seed assembly that induce one-handedness dominated system based on the majority rules.

自发手性对称破坏（SCSB）中的对映体过量现象是自然界同手性起源中的一个关键问题，而手性无机化合物长期以来一直被认为是外消旋物。在这里，我们报告了硫化镉纳米棒自组装中的 SCSB，导致远离外消旋体的手性偏差。在非手性有机物的存在下，在 {111} _cub / {0001} _hex的外延界面上随机形成具有沿杆轴单向旋转的晶格的螺旋状 CdSe@CdS 纳米棒（HCCN）飞机。螺旋位错结构的稳定性得到了对其结合能的理论分析的支持，这表明螺旋结构在非手性环境中出现的可能性。由 HCCN 的简单溶剂蒸发自组装诱导的分层手性膜在批次之间表现出自发的对映体过量，推测这源于对映体过量种子组装，该组装诱导基于多数规则的单手性主导系统。