Nanophase Inorganic Materials Chemistry

纳米相无机材料化学

• 批准号: 9816484
• 负责人: Jay Switzer
• 金额: $ 28.5万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9816484&HistoricalAwards=false
• 关键词: Nanophase; Inorganic; Materials; Chemistry

This interdisciplinary award to Jay A. Switzer at the University of Missouri-Rolla is supported by the Advanced Materials Program in the Chemistry Division and the Solid-state Chemistry Program in the Division of Materials Research. The focus of the research is the electrodeposition of layered nanostructures and superlattices with quantum-confined optical and electrical properties from aqueous solution under conditions of oscillating electrode potential at constant current. Highly anisotropic copper/cuprous oxide multilayers will be electrodeposited from alkaline copper lactate solution. The dependence of oscillation period, amplitude, wave shape, composition and layer thickness will be studied as a function of pH, concentration, current density, temperature, irradiation intensity and deposition substrate. The multilayers will be characterized by x-ray diffraction, scanning tunneling microscopy, scanning electron microscopy and transmission electron microscopy. The deposition process will be followed in real time by use of the electrochemical quartz crystal microbalance. The dependence of the optical properties on the cuprous oxide layer thickness will be studied by transmission and specular reflectance spectroscopy.Copper oxide films show blue-shifting consistent with quantum confinement and negative differential resistance characteristic of resonant tunneling. Tunneling devices will become increasingly important as dimensions shrink in computers and other electronic devices.

这个跨学科的奖项，以杰伊A。密苏里大学罗拉分校的Switzer由化学系的先进材料计划和材料研究系的固态化学计划提供支持。研究的重点是在恒定电流下振荡电极电位的条件下，从水溶液中电沉积具有量子限制的光学和电学性质的层状纳米结构和超晶格。在碱性乳酸铜溶液中电沉积出高度各向异性的铜/氧化亚铜多层膜。振荡周期，振幅，波形，成分和层厚度的依赖关系将被研究作为pH值，浓度，电流密度，温度，辐照强度和沉积衬底的函数。 多层膜的特征在于X射线衍射，扫描隧道显微镜，扫描电子显微镜和透射电子显微镜。利用电化学石英晶体微天平对沉积过程进行真实的实时跟踪。 通过透射光谱和镜面反射光谱研究了Cu 2 O3薄膜的光学性质与厚度的关系，发现Cu 2 O3薄膜呈现出蓝移现象，这与量子限制和共振隧穿的负微分电阻特性相一致。随着计算机和其他电子设备的尺寸缩小，Tunneling器件将变得越来越重要。