四方晶系
铁磁性
化学计量学
材料科学
硫化铁
硫化物
化学气相沉积
分子筛
磁性
超导电性
硫化
抗磁性
麦金纳维
化学工程
纳米技术
硫黄
结晶学
物理化学
化学
冶金
晶体结构
磁化
凝聚态物理
吸附
工程类
物理
磁场
量子力学
作者
Bi-Cheng Wang,Yu Yao,Wenting Hong,Zhaoan Hong,Xu He,Taiku Wang,Chuanyong Jian,Qiankun Ju,Qian Cai,Zhihua Sun,Wei Liu
出处
期刊:Small
[Wiley]
日期:2023-03-15
卷期号:19 (23)
被引量:1
标识
DOI:10.1002/smll.202207325
摘要
Abstract 2D Fe‐chalcogenides have drawn significant attention due to their unique structural phases and distinct properties in exploring magnetism and superconductivity. However, it remains a significant challenge to synthesize 2D Fe‐chalcogenides with specific phases in a controllable manner since Fe‐chalcogenides have multiple phases. Herein, a molecular sieve‐assisted strategy is reported for synthesizing ultrathin 2D iron sulfide on substrates via the chemical vapor deposition method. Using a molecular sieve and tuning growth temperatures to control the partial pressures of precursor concentrations, hexagonal FeS, tetragonal FeS, and non‐stoichiometric Fe 7 S 8 nanoflakes can be precisely synthesized. The 2D h‐FeS, t‐FeS, and Fe 7 S 8 have high conductivities of 5.4 × 10 5 S m −1 , 5.8 × 10 5 S m −1 , and 1.9 × 10 6 S m −1 . 2D tetragonal FeS shows a superconducting transition at 4 K. The spin reorientation at ≈30 K on the non‐stoichiometric Fe 7 S 8 nanoflakes with ferrimagnetism up to room temperature has also been observed. The controllable synthesis of various phases of 2D iron sulfide may provide a route for synthesizing other 2D compounds with various phases.
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