Structural Transformations in Irradiated Silicon Germanium Alloys

这个研究项目的目的是获得对地球上不寻常的物理变化的基本理解。在非常高的氪离子辐照剂量下，锗从无定形转变为高度网络化的海绵状结构。在硅或大多数其他材料中没有观察到类似的转变。该方法是研究x在1到0范围内的Si(1-x)Gex合金系列的转变现象，并研究和表征辐照材料的光学性质。该项目由UNC和Argonne国家实验室合作，该研究有望为半导体材料的辐射效应和光学特性提供新的基础信息和见解。该项目是多学科结合材料物理和加工研究与先进的表征工具和分析方法，以解决前沿研究问题，在一个技术相关的主题领域。该研究将为电子/光子器件和集成电路的加工和制造的重要方面提供基础材料科学知识。此外，从本研究项目中获得的知识和理解有望通过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，从而为提高先进设备和电路的性能做出贡献。该计划的一个重要特点是通过培养学生在一个基础和技术上重要的领域的研究和教育的整合。＊＊＊

9616105 McNeil This research project aims to gain fundamental understanding of an unusual physical transformation in Ge. At very high Kr ion irradiation doses, Ge converts from an amorphous to a highly networked spongy structure. A similar transformation is not observed in Si, or most other materials. The approach is to investigate the transformation phenomena in a Si(1-x)Gex alloy series with x spanning the range of 1 to 0, and also to investigate and characterize the optical properties of the irradiated materials. The project is collaborative between UNC and Argonne National Laboratory, and the research is expected to provide new fundamental information and insights into radiation effects and optical properties of semiconductor materials. %%% The project is multidisciplinary combining materials physics and processing studies with advanced characterization tools and analysis methods to address forefront research issues in a topical area of technological relevance. The research will contribute basic materials science knowledge at a fundamental level to important aspects of processing and fabricating electronic/photonic devices and integrated circuitry. Additionally, the knowledge and understanding gained from this research project is expected to contribute in a general way to improving the performance of advanced devices and circuits 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. ***