Chiral nanomaterials provide a rich platform for versatile applications. Tuning the wavelength of polarization rotation maxima in the broad range including short-wave infrared (SWIR) is a promising candidate for infrared neural stimulation, imaging, and nanothermometry. However, the majority of previously developed chiral nanomaterials reveal the optical activity in a relatively shorter wavelength range (ultraviolet–visible, UV–vis), not in SWIR. Here, we demonstrate a versatile method to synthesize chiral copper sulfides using cysteine, as the stabilizer, and transferring the chirality from molecular- to the microscale through self-assembly. The assembled structures show broad chiroptical activity in the UV–vis-NIR-SWIR region (200–2500 nm). Importantly, we can tune the chiroptical activity by simply changing the reaction conditions. This approach can be extended to materials platforms for developing next-generation optical devices, metamaterials, telecommunications, and asymmetric catalysts.

中文翻译：

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通过从分子到微米尺度的手性转移，从紫外到短波红外的广泛手性活动

手性纳米材料为多种应用提供了丰富的平台。在包括短波红外 (SWIR) 在内的广泛范围内调整偏振旋转最大值的波长是红外神经刺激、成像和纳米测温的有希望的候选者。然而，大多数先前开发的手性纳米材料在相对较短的波长范围内（紫外-可见光、紫外-可见光）显示出光学活性，而不是在 SWIR 中。在这里，我们展示了一种使用半胱氨酸作为稳定剂合成手性硫化铜的通用方法，并通过自组装将手性从分子尺度转移到微米尺度。组装的结构在 UV-vis-NIR-SWIR 区域（200-2500 nm）中显示出广泛的手性光学活性。重要的是，我们可以通过简单地改变反应条件来调整手性活性。