Studies of Localized Impurities in Quantum Dots using Synchrotron Radiation

使用同步辐射研究量子点中的局域杂质

• 批准号: 9732660
• 负责人: Yi-Han Kao
• 金额: $ 30万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9732660&HistoricalAwards=false
• 关键词: Studies; Localized; Impurities; Quantum; Dots

9732660 Kao This University/Industry collaborative GOALI project focuses on preparation and characterization of doped quantum dots to identify and gain understanding of mechanisms responsible for their unusual properties. New types of doped quantum dots will be designed, prepared, and characterized using synchrotron radiation at the National Synchrotron Light Source at Brookhaven National Laboratory. Various doped quantum dots, especially rare-earth doped oxides, as well as thin films and nano-channel grids, will be prepared and studied. Synchrotron radiation experiments will include x-ray excited luminescence (XEL), extended x-ray absorption fine structure (EXAFS), response time of doped quantum dots to x-ray pulses, geometrical resonance, and studies of coherent light emission in nanowires and nanodots. The XEL and EXAFS measurements are expected to be particularly useful for probing the local environment surrounding impurity atoms and for understanding impurity-host interactions. The project is co- supported by the DMR Electronic Materials Program and the MPS OMA(Office of Multidisciplinary Activities). %%% Basic research issues in a topical area of materials science having strong technological relevance are addressed by this project. The basic knowledge and understanding gained from the research is expected to contribute to improving the performance of advanced materials by providing a fundamental understanding and a basis for designing and producing improved nanostructures. An important feature of the program is the integration of research and education by providing an important educational opportunity through the GOALI aspect of the project for students to experience both academic and industrial research approaches and environments. ***

9732660 Kao 该大学/工业界合作的 GOALI 项目专注于掺杂量子点的制备和表征，以识别和了解导致其异常特性的机制。新型掺杂量子点将在布鲁克海文国家实验室的国家同步加速器光源中使用同步加速器辐射进行设计、制备和表征。将制备和研究各种掺杂量子点，特别是稀土掺杂氧化物，以及薄膜和纳米通道网格。同步辐射实验将包括X射线激发发光（XEL）、扩展X射线吸收精细结构（EXAFS）、掺杂量子点对X射线脉冲的响应时间、几何共振以及纳米线和纳米点相干光发射的研究。 XEL 和 EXAFS 测量预计对于探测杂质原子周围的局部环境和了解杂质-主体相互作用特别有用。该项目得到了 DMR 电子材料项目和 MPS OMA（多学科活动办公室）的共同支持。 %%% 该项目解决了具有很强技术相关性的材料科学主题领域的基础研究问题。从研究中获得的基本知识和理解预计将有助于提高先进材料的性能，为设计和生产改进的纳米结构提供基本的理解和基础。 该项目的一个重要特点是研究和教育的融合，通过项目的 GOALI 方面为学生提供重要的教育机会，让他们体验学术和工业研究方法和环境。 ***