Synthesis and Physical Properties of Alkalide and Electride Films and Microcrystals

碱金属化合物、电子化合物薄膜及微晶的合成及物理性能

• 批准号: 8717763
• 负责人: James Dye
• 金额: $ 32.48万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8717763&HistoricalAwards=false
• 关键词: Synthesis; Physical; Properties; Alkalide; Electride

Salts of alkali metal anions (alkalides) or trapped electrons (electrides) will be synthesized as homogeneous thin films by vapor deposition and as microcrystalline films by solvent evaporation. The optical properties will be studied by transmission spectra, reflectance spectra (from single crystals) and fluorescence spectra. Electron energy loss spectra in a field emission scanning transmission electron microscope will be measured. The conductivity and photoconductivity of thin films will be determined in the vapor deposition apparatus. Photoelectron emission and thermionic electron emission will be studied by using both specialized equipment and the vapor deposition system. The study of the optical and electronic properties of alkalides, electrides and mixed systems should permit determination of the nature of electron.electron interactions in a crystalline solid with weakly trapped electrons, the factors which lead to electron spin pairing, and the nature of the metal.non metal transition in a crystalline analog of metal.ammonia solutions. The weak binding of electrons in electrides leads to thermionic emission and photoelectron emission in the near infrared. Extension of these studies might lead to the development of an infrared photoelectron emitter.

碱金属阴离子的盐（碱金属化物）或俘获电子 （二氧化钛）将被合成为均匀的薄膜， 气相沉积和溶剂法制备微晶薄膜 蒸发 光学性质将通过以下方式进行研究： 透射光谱、反射光谱（来自单晶） 和荧光光谱。 电子能量损失谱 场发射扫描透射电子显微镜将是 测定了 薄膜的电导率和光电导 将在气相沉积设备中确定。 光电子发射和负离子电子发射将是 通过使用专门的设备和蒸汽进行研究， 沉积系统。 碱金属化合物的光电性质研究， 混合系统应允许确定 晶体中电子与电子相互作用的性质 对于弱俘获电子， 自旋配对和金属的性质。 一种类似金属的晶体。氨溶液。 弱者 电子在晶体中的结合导致电子发射 以及近红外线的光电子发射。 延长 这些研究可能会导致红外线的发展， 光电子发射体