UV Spectroscopy of Metal-Organic Molecular Beam Epitaxy (MOMBE)

金属有机分子束外延 (MOMBE) 的紫外光谱

• 批准号: 9112279
• 负责人: Thomas Pearsall
• 金额: $ 4.99万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9112279&HistoricalAwards=false
• 关键词: UV; Spectroscopy; Metal; Organic; Molecular

This grant if for the purchase of an ultra-violet spectroscopy system for research on the chemistry and thermodynamics of epitaxial growth by chemical beam epitaxy in-situ and in real time. UV spectroscopy is a powerful scientific tool that is best suited for the study of growth processes by chemical beam epitaxy. The equipment described in this proposal will create the capability for UV absorption spectroscopy and laser-induced fluorescence spectroscopy. These two techniques will be used for the investigation of epitaxial growth of III-V semiconductor and alloy microstructures. In contrast to molecular beam epitaxy in which elemental sources are used, gas sources (metal- organics and hydrides) are used in chemical beam epitaxy. Consequently the chemical dynamics of epitaxial growth are more complex, but easier to measure than is the case in MBE. With the equipment requested in this proposal, it will be possible to obtain quantitative chemical information by probing the region just above the substrate. This equipment can provide information about the concentrations and electronic states of molecular and atomic species. The type of equipment needed for the UV spectroscopy described in this proposal is not available as a single unit from any supplier, and in order to perform such studies, it is necessary to assemble appropriate individual components.

这笔赠款如果用于购买紫外线 用于化学研究的光谱系统 和外延生长的热力学 原位和真实的时间的化学束外延。 紫外光谱是一种强大的科学工具， 最适合研究生长过程， 化学束外延 描述的设备 在这个建议中，将创造紫外线的能力， 吸收光谱和激光诱导 荧光光谱法 这两种技术 将用于外延生长的研究 III-V族半导体和合金微结构。 与分子束外延相反， 使用元素源，气体源（金属， 有机物和无机物）用于化学束 外延生长 因此， 外延生长更复杂，但更容易 比MBE的情况更好。 与 本建议书中要求的设备， 可能获得定量化学信息 通过探测衬底正上方的区域。 这 设备可以提供有关 分子的浓度和电子态 原子物种。 所需设备类型 对于本提案中所述的紫外光谱 不能从任何供应商处作为单个单元获得， 为了进行这样的研究， 组装合适的单个组件。