Half-metallic ferromagnetism in synthetic Co9Se8 nanosheets with atomic thickness.
Half-metallic ferromagnetism in synthetic Co9Se8 nanosheets with atomic thickness.
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DOI：
10.1021/ja3046603
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发表时间：
2012-07
影响因子：
15
通讯作者：
Xiaodong Zhang;Jiajia Zhang;Jinyang Zhao;B. Pan;M. Kong;J. Chen;Yi Xie
中科院分区：
文献类型：
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作者：
Xiaodong Zhang;Jiajia Zhang;Jinyang Zhao;B. Pan;M. Kong;J. Chen;Yi Xie
控制非层状材料的原子厚纳米片的合成是极其具有挑战性的，因为缺乏用于二维（2D）结构的各向异性生长的内在驱动力。在这种情况下，控制各向异性，例如在反应过程中小结构单元的定向附着，将是实现2D纳米片的有效方法。这些原子厚度的纳米片具有新颖的电子结构和物理性质相比，相应的块体样品。在这里，我们报告的Co（9）Se（8）单晶纳米片的原子厚度和独特的层状堆叠形成的二维取向连接。原子厚度的Co（9）Se（8）纳米片表现出本征半金属铁磁性，实验测量和理论计算都证实了这一点.这项工作不仅为寻找新的半金属铁磁系统打开了一扇新的大门，而且为设计透明，透明和柔性的纸状自旋电子器件铺平了一条实用的道路。
Controlling the synthesis of atomic-thick nanosheets of nonlayered materials is extremely challenging because of the lack of an intrinsic driving force for anisotropic growth of two-dimensional (2D) structures. In that case, control of the anisotropy such as oriented attachment of small building blocks during the reaction process will be an effective way to achieve 2D nanosheets. Those atomic-thick nanosheets possess novel electronic structures and physical properties compared with the corresponding bulk samples. Here we report Co(9)Se(8) single-crystalline nanosheets with atomic thickness and unique lamellar stacking formed by 2D oriented attachment. The atomic-thick Co(9)Se(8) nanosheets were found to exhibit intrinsic half-metallic ferromagnetism, as supported by both our experimental measurements and theoretical calculations. This work will not only open a new door in the search for new half-metallic ferromagnetic systems but also pave a practical way to design ultrathin, transparent, and flexible paperlike spintronic devices.