Rare Earth-Doped Silicon Nanoparticles: Synthesis, Characterization, and Photophysical Studies

稀土掺杂硅纳米粒子：合成、表征和光物理研究

• 批准号: 9819178
• 负责人: Jeffery Coffer
• 金额: $ 31.26万
• 依托单位: Texas Christian University
• 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: 1999-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819178&HistoricalAwards=false
• 关键词: Rare; Earth; Doped; Silicon; Nanoparticles

9819178 Coffer This project will aim to study systematically the effects of rare earth ion incorporation into the structure of discrete silicon nanoparticles of varying size. The nanoparticles will be prepared by the co-pyrolysis of disilane and a rare earth precursor complex in a high temperature aerosol reactor. The nanoparticles will be characterized by high- and low-resolution photoluminescence spectroscopy, transmission and high resolution electron microscopy, and ultraviolet and visible absorption spectroscopy. The study will include an emphasis on the rare earth ions erbium and europium as large rare-earth doped silicon nanoparticles in the 12 to 100 nanometer size regime, as well as in the small rare-earth doped silicon nanoparticle 1 to 4 nanometer size regime. The goals include evaluating the role of the silicon host particle size on the photophysical properties of the rare earth center, especially energy transfer, and assessing the possibility of large silicon nanoparticles acting as optical cavities for the enhancement of rare earth ion luminescence.%%%This project aims to establish the fundamental physical and chemical properties, to include optical and magnetic properties of nanoparticles that strongly depend on not only the chemical composition, but also on the size of the particle. From progress in this area of nanosciences it is predicted that circuits and devices based on nanoclusters exhibiting novel optical, magnetic and electronic properties will enable the shrinkage of a computational or information storage unit to near molecular dimensions as well as decrease the power requirements of these units orders of magnitude less than currently needed.

9819178 该项目旨在系统地研究稀土离子掺入不同尺寸的离散硅纳米颗粒结构中的影响。 纳米颗粒将通过乙硅烷和稀土前体复合物在高温气溶胶反应器中的共热解来制备。 纳米粒子将通过高分辨率和低分辨率光致发光光谱、透射和高分辨率电子显微镜以及紫外和可见吸收光谱进行表征。 该研究将包括强调稀土离子铒和铕作为12至100纳米尺寸范围内的大型稀土掺杂硅纳米颗粒，以及1至4纳米尺寸范围内的小型稀土掺杂硅纳米颗粒。 目标包括评估硅基质颗粒尺寸对稀土中心的光物理性质，特别是能量传递的作用，并评估大硅纳米颗粒作为增强稀土离子发光的光学腔的可能性。该项目旨在建立基本的物理和化学性质，包括纳米颗粒的光学和磁性，这些性质不仅强烈依赖于化学成分，而且还依赖于颗粒的大小。 从纳米科学这一领域的进展，可以预测，基于纳米团簇的电路和器件表现出新颖的光学、磁性和电子特性，将使计算或信息存储单元缩小到接近分子尺寸，并将这些单元的功率需求降低到低于当前所需的数量级。