Solution Synthesis of Layered van der Waals (vdW) Ferromagnetic CrGeTe3 Nanosheets from a Non-vdW Cr2Te3Template
| Autor: | Fang Wang, Huan Yang, Liyan Hu, Lanfang Wang, Lihong Guo, Huisheng Zhang, Ding-Jiang Xue, Xiaohong Xu |
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| Rok vydání: | 2020 |
| Předmět: |
Steric effects
Chemistry General Chemistry Solution synthesis 010402 general chemistry 01 natural sciences Biochemistry Catalysis Lower energy 0104 chemical sciences symbols.namesake Colloid and Surface Chemistry Ferromagnetism Chemical physics Lattice (order) symbols Curie temperature van der Waals force Ferromagnetic order |
| Zdroj: | Journal of the American Chemical Society. 142:4438-4444 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | CrGeTe3 has recently emerged as a new class of two-dimensional (2D) materials due to its intrinsic long-range ferromagnetic order. However, almost all the reported synthesis methods for CrGeTe3 nanosheets are based on the conventional mechanical exfoliation from single-crystalline CrGeTe3, which is prepared by the complicated self-flux technique. Here we report a solution-processed synthesis of CrGeTe3 nanosheets from a non-van der Waals (vdW) Cr2Te3 template. This structure evolution from non-vdW to vdW is originated from the substitution of Ge atoms on the Cr sites surrounded by fewer Te atoms in the Cr2Te3 lattice due to their smaller steric hindrance and lower energy barrier. These CrGeTe3 nanosheets present regular hexagonal structures with a diameter larger than 1 μm and excellent stability. They exhibit soft magnetic behavior with a Curie temperature lower than 67.5 K. This non-vdW to vdW synthesis strategy promotes the development of CrGeTe3 in ferromagnetism while providing an effective route to synthesize other 2D materials. |
| Databáze: | OpenAIRE |
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