Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.

中文翻译：

---

通过小平面钝化及其无序表面调制的各向异性氟化物纳米晶体

金红石型氟化物已被证明是新兴反铁磁装置中的活性成分。然而，由于缺乏有效的各向异性控制，低维，特别是二维 (2D) 氟化物的可控合成仍未实现，这阻碍了它们在缩小尺寸方面的进一步发展。我们在此报告，{110} 生长面的钝化改变可以将金红石型氟化物纳米晶体以胶体方法合成为明确定义的零维 (0D) 颗粒、一维 (1D) 棒和二维片。由于长程反铁磁有序和无序表面自旋的共存，获得的纳米晶体显示出正交换偏置和增强的磁转变温度，