相关实验视频
Updated: May 27, 2026
12:35
Atomically Traceable Nanostructure Fabrication
Published on: July 17, 2015
8.7K
在2D和3D表面拓上进行等离子体增强的空间原子层沉积:无形和晶体TiO的案例2
Mike van de Poll1, Jie Shen2, James Hilfiker3
1Department of Applied Physics and Science Education, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
The journal of physical chemistry. C, Nanomaterials and interfaces
|February 19, 2025
概括
用等离子体增强的空间原子层沉积 (PE-s-ALD) 允许低温薄膜制造. 这项研究揭示了3D结构中的部分结晶如何影响薄膜厚度和性能,提供了控制见解.
科学领域:
- 材料科学 材料科学 材料科学
- 薄膜沉积的情况
- 纳米技术纳米技术
背景情况:
- 增强等离子体空间原子层沉积 (PE-s-ALD) 对于低温,高容量薄膜制造至关重要.
- 对3D表面的整形沉积对于光学涂层,电解剂和电池等应用至关重要.
- 了解结晶和生长效应是控制薄膜特性和配置文件的关键.
研究的目的:
- 使用PE-s-ALD研究二氧化 (TiO2) 的复杂生长机制.
- 分析过程参数 (循环,温度,曝光) 对薄膜特性的影响.
- 在3D结构中确定结晶,薄膜厚度和每周期的生长之间的相互作用.
主要方法:
- 在平面和3D基板上沉积的TiO2薄膜使用PE-s-ALD.
- 系统地改变了沉积温度,周期数和暴露时间.
- 作为深度的函数来表征薄膜厚度,结晶度和组成.
主要成果:
- 在3D结构中,平面表面的解剖相形成是不完整的;更深的区域保持无形.
- 部分结晶与薄膜厚度降低到3D特征中的关键结晶值有关.
- 结晶和无形相之间的每周期生长差异显著影响了最终的厚度形状.
- 在大气压下氧基的重组概率被确定为3 × 10−5.5.
结论:
- 提出了一个框架,用于控制PE-s-ALD在3D结构上的晶度和厚度.
- 由于相位依赖的生长速度,部分结晶显著影响厚度概况.
- 低的重组概率表明PE-ALD的合规性差异源于基密度和扩散,而不是重组率.
相关概念视频
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
02:58Crystal Field Theory - Octahedral Complexes
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...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
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,...
01:25Imperfections in Crystal Structure: Point, Line and Plane Defects
A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...