Hydrogen dangling bonds induce ferromagnetism in two-dimensional metal-free graphitic-C(3)N(4) nanosheets.
Hydrogen dangling bonds induce ferromagnetism in two-dimensional metal-free graphitic-C(3)N(4) nanosheets.
复制标题
氢悬键在二维无金属石墨-C3N4 纳米片中诱导铁磁性
DOI：
10.1039/c4sc02576h
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发表时间：
2015-01-01
期刊：
影响因子：
8.4
通讯作者：
Xie Y
中科院分区：
文献类型：
--
作者：
Xu K;Li X;Chen P;Zhou D;Wu C;Guo Y;Zhang L;Zhao J;Wu X;Xie Y
通过引入氢悬空键，实现了二维无金属g-C3N4纳米片的诱导铁磁性。铁磁二维（2D）超薄纳米片在下一代电子产品中具有很大的前景。铁磁性无金属材料通常只有s/p电子构型，具有弱自旋轨道耦合和大自旋弛豫时间，将在构建未来的自旋电子器件中发挥重要作用。然而，大多数无金属材料缺乏固有的自旋有序结构，极大地阻碍了铁磁性二维纳米结构范围的扩大以及对其铁磁性性质的深入了解。本文通过引入氢悬空键的新策略，实现了二维无金属g-C3N4超薄纳米片的本征铁磁性诱导。在我们的研究中，具有氢悬空键的g-C3N4超薄纳米片表现出明显的室温铁磁行为，甚至可以通过氢的浓度来调节。这项工作将为设计二维纳米材料系统的特性铺平新的道路。
Inducing ferromagnetism in two dimensional metal-free g-C3N4 nanosheets has been achieved through the introduction of hydrogen dangling bonds. Ferromagnetic two-dimensional (2D) ultrathin nanosheets hold great promise for next generation electronics. Ferromagnetic metal-free materials that usually possess only an s/p electronic configuration with weak spin–orbit coupling and a large spin relaxation time, would play an important role in constructing future spintronic devices. However, the absence of an intrinsic spin ordering structure in most metal-free materials greatly hampers the widening scope of ferromagnetic 2D nanostructures as well as in-depth understanding of their ferromagnetic nature. Herein, the induction of intrinsic ferromagnetism in 2D metal-free g-C3N4 ultrathin nanosheets has been achieved through a new effective strategy whereby hydrogen dangling bonds are introduced. In our case, g-C3N4 ultrathin nanosheets with hydrogen dangling bonds showed obvious room temperature ferromagnetic behavior that could even be tuned by the concentration of hydrogen. This work will pave a new pathway to engineer the properties of 2D nanomaterial systems.