具有可调节性质的纳米线的连续气相合成
Magnus Heurlin1, Martin H Magnusson, David Lindgren
1Division of Solid State Physics, Lund University, 22100 Lund, Sweden.
Nature
|December 4, 2012
概括
基于气溶的方法Aerotaxy使半导体纳米线的连续,高吞吐量生产成为可能. 这种方法提供了可控的尺寸,高晶度和显著的增长率,以实现经济高效的设备制造.
科学领域:
- 纳米技术 纳米技术
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
背景情况:
- 半导体纳米线对于先进的电子和光电子设备至关重要.
- 工业规模生产高质量的纳米电线具有受控的特性仍然是一个重大挑战.
研究的目的:
- 引入和验证aerotaxy作为一种用于连续,大规模纳米线合成的新方法.
- 通过使用aerotaxy来证明对纳米线尺寸,晶度和材料组成的精确控制.
主要方法:
- 利用了以气溶为基础的生长技术 - - 气溶,采用催化大小选择的金 (Au) 纳米颗粒.
- 研究了甲 (GaAs) 纳米线以每秒大约1微米的增长速度的生长.
- 多种增长参数,如温度,时间和Au粒子大小,以控制纳米线特性.
主要成果:
- 在显著增强的速度 (比传统方法快20-1000倍) 实现了控制的纳米尺寸和高晶度的连续纳米线生长.
- 证明了对纳米线尺寸和形状的可重复控制,从而产生定制的光学和电子特性.
- 光发光和传输电子显微镜证实了良好的光学特性,光谱均性和首选的晶体生长方向.
结论:
- Aerotaxy为生产高质量的半导体纳米线提供了一个可扩展,具有成本效益的解决方案.
- 这种方法有可能使先进的基于纳米线的设备在工业规模上制造成为可能.
相关概念视频
The Equilibrium Constant
Consider the oxidation of sulfur dioxide:
Constitutional Isomers of Alkanes
Organic compounds of the same molecular formula can have different structural formulas called constitutional isomers, and the phenomenon is known as constitutional isomerism. Alkanes with four or more carbons showing multiple structures with the same molecular formula thereby exhibit constitutional isomerism.
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the branched isomers are given...
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the branched isomers are given...
Combustion Energy: A Measure of Stability in Alkanes and Cycloalkanes
The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were initially termed as “paraffins,” derived from the Latin words: parum, meaning “too little,” and affinis, meaning “affinity.”
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified petroleum gas (LPG), fuel oil, gasoline, diesel fuel, and...
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified petroleum gas (LPG), fuel oil, gasoline, diesel fuel, and...
Stability of Conjugated Dienes
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
Spin–Spin Coupling: One-Bond Coupling
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
Gas Solubility
Gas solubility in liquids forms liquid-gas solutions, such as soft drinks, where carbon dioxide is dissolved in water, and the ocean, where the solubility of oxygen and carbon dioxide supports marine life. The ability of oceans to dissolve gases impacts weather conditions in the troposphere.However, gas-liquid interactions vary. For instance, hydrogen chloride gas is highly soluble in water, while oxygen's solubility is much lower. Because these solutions are non-ideal, Raoult’s law, which...


