不同晶体特性对自旋交叉复合体两个多态体的电导率的影响
Rifat Mahbub1, Kayleigh A McElveen2, M Zaid Zaz3
1Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, 900 N 16th St., Lincoln, NE 68588, United States of America.
概括
铁(II) 三醇纳米棒的电导率高于纳米粒子. 这种差异与铁-键的长度有关,较短的键与旋转交叉复合体中较高的导电性相关.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 旋转交叉 (SCO) 综合体表现出明显的高旋转和低旋转状态.
- 铁二) 三醇 (FeHtrz2BF4) 是一种具有潜在电子应用的SCO复合物.
- 在SCO材料中的多态性可以影响其物理性质.
研究的目的:
- 为了比较纳米粒子和纳米聚合物[Fe(Htrz) 2(trz) ](BF4) 的结构和电传特性.
- 研究SCO纳米结构中的结构参数和导电性之间的关系.
- 为了研究旋转状态和照明对[Fe(Htrz) 2(trz) ](BF4) 纳米棒的导电性的影响.
主要方法:
- [Fe(Htrz) 2(trz) ](BF4) 纳米粒子和纳米棒的合成.
- 导电原子力显微镜 (CAFM) 用于绘制电导率.
- 在黑暗和照明条件下进行可变温度传输测量 (320-380 K).
主要成果:
- [Fe ((Htrz) 2 ((trz) ] ((BF4) 的纳米棒显示出比纳米粒子更高的电导率.
- 在Fe-N键长度和导电性之间观察到一个逆相关性.
- 在黑暗条件下的低旋转状态下,纳米棒的导电性最高.
- 照明减少了自旋状态之间的导电率变化.
结论:
- 多态性显著影响[Fe(Htrz) 2(trz) ](BF4) SCO复合体的电传特性.
- Fe-N 键长是影响这些材料导电性的关键结构因素.
- SCO纳米结构的旋转状态和光敏感性为电子设备应用提供了途径.
更多相关视频
08:43Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
Published on: November 7, 2016
8.0K
09:00Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
9.8K
相关概念视频
02:58Crystal Field Theory - Octahedral Complexes
26.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K
03:02Colors and Magnetism
11.5K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.5K
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
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.5K
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,...
41.5K
02:54Molecular and Ionic Solids
16.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.9K
01:21Polymer Classification: Crystallinity
2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K