Synthesis of GA-Nitride Nanoclusters by Precursor Dispersion in Block Copolymer Cavities

9730019 Risbud该项目的目标是开发适用于量子点结构的III-V族氮化物纳米团簇的新合成科学。 该方法是将来自嵌段共聚物和氮化物化合物前体的合成化学的灵感联合收割机组合以处理隔离在聚合物基质中的III-V族氮化物材料的纳米晶体。氮化物量子点的微观，光学和电子特性的平行调查将继续进行。透射电子显微镜和电子衍射将被用来研究量子点的结构、尺寸分布和缺陷。光学光谱将被用来表征量子点的带隙，量子限制，和发射过程（光致发光和时间分辨光谱）。将使用这些主要的测量和表征方法研究合成参数、缺陷、表面钝化和杂质对III-V族氮化物量子点的行为的影响。 该项目解决了具有高技术相关性的材料科学专题领域的基础研究问题。该研究将在基础层面上为电子/光子器件的重要方面提供基础材料科学知识。从研究中获得的基本知识和理解预计将有助于提高先进设备的性能和稳定性，为设计和生产改进的材料和材料组合提供基本的理解和基础。 该计划的一个重要特点是通过在一个基本和技术上重要的领域对学生进行培训来整合研究和教育。

9730019 Risbud The goal of this project is to develop new synthesis science for III-V nitride nanoclusters applicable to quantum dot structures. The approach is to combine inspirations from the synthetic chemistry of block copolymers and precursors to nitride compounds to process nanocrystals of III-V nitride materials sequestered in polymeric matrices. Parallel investigations of the microscopic, optical and electronic properties of nitride quantum dots will be pursued. Transmission electron microscopy and electron diffraction will be employed to study the structure, size distribution, and defects of the quantum dots. Optical spectroscopies will be used to characterize the band gap of the quantum dots, quantum confinement, and- emission processes (photoluminescence and time resolved spectroscopy). The effects of synthesis parameters, defects, surface passivation, and impurities on the behavior of the III-V nitride quantum dots will be studied using these primary measurement and characterization methods. %%% The project addresses basic research issues in a topical area of materials science having high technological relevance. The research will contribute basic materials science knowledge at a fundamental level to important aspects of electronic/photonic devices. The basic knowledge and understanding gained from the research is expected to contribute to improving the performance and stability of advanced devices by providing a fundamental understanding and a basis for designing and producing improved materials, and materials combinations. An important feature of the program is the integration of research and education through the training of students in a fundamentally and technologically significant area.