间层受影响的钻石电化学
Xinyue Chen1, Ximan Dong1, Chuyan Zhang1
1Institute of Materials Engineering, University of Siegen, 57076, Siegen, Germany.
Small methods
|June 14, 2024
概括
介层通过增强电子转移,显著影响钻石电化学. 量身定制的层间设计,就像使用TaC一样,改进了基于钻石的电化学设备和超级电容器.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 钻石的电化学是由sp3碳含量,表面终结和晶体结构决定的.
- 基板间层代表了一种影响钻石膜电化学性能的新型因素.
研究的目的:
- 研究Ti和Ta中间层对在Si基板上生长的和联合化纳米晶体钻石 (BNDD) 薄膜的影响.
- 探索层间组成,界面结构,电荷传输和电化学性能之间的关系.
主要方法:
- 在有或没有Ti/Ta间层的Si上BNDD薄膜的生长 (BNDD/Si,BNDD/Ti/Si,BNDD/Ta/Ti/Si).
- 使用显微镜,光谱,电化学技术和密度函数理论 (DFT) 模拟的表征.
- 使用优化的BNDD电极制造和测试超级电容器设备.
主要成果:
- 与BNDD/Si和BNDD/Ti/Si相比,BNDD/Ta/Ti/Si电极表现出明显更快的电子传递过程.
- 层间诱导的TAC形成减少了屏障宽度,促进了载体道化,增加了活性缺陷度.
- 在BNDD/Ta/Ti/Si电极允许在氧化电解质超级电容器中提高性能.
结论:
- 层间的组成决定了钻石电极的内在活性和反应动力学.
- 量身定制的间层设计是推动基于钻石的电化学设备的有希望的策略.
- 这项研究强调了介层在使用钻石的电化学应用中释放新能力的潜力.
更多相关视频
09:13Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
Published on: April 1, 2017
13.6K
11:33All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
9.6K
相关概念视频
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
02:58Crystal Field Theory - Octahedral Complexes
26.3K
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...
26.3K
02:54Trends in Lattice Energy: Ion Size and Charge
23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K
01:24Van der Waals Interactions
63.8K
Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
63.8K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.0K
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,...
42.0K
02:18Network Covalent Solids
13.4K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
13.4K