在1D混合矿铁电材料中,H/F替代策略可以实现很大的自发偏振
Jiu-Yang Liu1, Meng-Meng Lun1, Zhi-Jie Wang1
1Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University Nanjing 211189 People's Republic of China dawei@seu.edu.cn.
Chemical science
|September 23, 2024
概括
研究人员开发了一种新的1D混合有机-无机矿 (HOIP) 铁电, (3-F-BTAB) PbBr3,具有增强的极化和较低的强制场. 这一突破推动了灵活的电子和低压数据存储应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 晶体学 晶体学是指结晶学.
背景情况:
- 混合有机-无机矿 (HOIP) 是用于智能开关,传感器和数据存储的有希望的铁电材料.
- 自发偏振 (Ps) 和强制场 (Ec) 的限制阻碍了当前铁电的广泛应用.
- 分子铁电提供了下一代灵活可穿戴电子产品的潜力.
研究的目的:
- 为了合成一种具有改进铁电性质的新型1D HOIP铁电.
- 克服现有铁电材料中小Ps和大Ec的局限性.
- 为开发低压极性记忆提供指导.
主要方法:
- 在 (BTAB) PbBr3.3.上使用H/F替代策略合成一种新的1D HOIP铁电, (3-F-BTAB) PbBr3.
- 在420K发生的铁电相变的表征,Aizu标记为2/mF2.2.
- 测量铁电性质,包括自发偏振 (Ps) 和强制场 (Ec).
主要成果:
- 合成的 (3-F-BTAB) PbBr3 呈现出 7.18 μC cm-2.2 的大量自发极化 (Ps).
- 该材料显示了1.78kV cm-1的低强制场 (Ec).
- (3-F-BTAB) PbBr3在报告的1D基HOIP铁电器中显示了最高的Ps.
结论:
- 新的1D HOIP铁电 (3-F-BTAB) PbBr3与现有材料相比,显著提高了铁电性能.
- 这项研究扩大了1D基铁电器的家族.
- 这些发现为铁电在低压极性内存设备和灵活电子产品中的应用提供了宝贵的见解.
相关概念视频
01:31Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
01:27π Electron Effects on Chemical Shift: Overview
1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
02:42Valence Bond Theory
8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K
03:24Hybridization of Atomic Orbitals I
46.6K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
46.6K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.7K
01:16Electrophilic Aromatic Substitution: Overview
10.8K
In an electrophilic aromatic substitution reaction, an electrophile substitutes for a hydrogen of an aromatic compound.
10.8K