Determining the true or false chirality of a system is essential for the design of advanced chiral materials and for improving their applications. Typically, a magnetic field would cause false optical activity in the chiral material system, thus confusing the true chirality’s influence. Here, we provide a simple way to uncover the true and false chirality in chiral ferrimagnetic nanoparticles (FNPs) by using the gel as a rigid frame. The remnant local magnetic field of the FNP gel can be easily adjusted by an external magnetic field or by controlling the concentration of the FNPs. Moreover, the potential application of the FNP gel is detected by induced magnetic circularly polarized luminescence. This work provides deep insight into the true and false chirality in magnetic nanosystems and offers a strategy to construct new optic elements with an adjustable local magnetic field.

中文翻译：

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手性磁性纳米粒子的真手性和假手性

确定系统的真手性或假手性对于先进手性材料的设计和改进其应用至关重要。通常，磁场会在手性材料系统中引起错误的光学活动，从而混淆真正的手性的影响。在这里，我们提供了一种简单的方法，通过使用凝胶作为刚性框架来揭示手性亚铁磁纳米粒子（FNP）中的真手性和假手性。 FNP 凝胶的残余局部磁场可以通过外部磁场或控制 FNP 的浓度轻松调节。此外，FNP 凝胶的潜在应用是通过感应磁圆偏振发光来检测的。这项工作深入洞察了磁性纳米系统中的真手性和假手性，并提供了构建具有可调节局部磁场的新光学元件的策略。