Self-Organized Phases and Patterns in Epitaxial Film Systems

外延膜系统中的自组织相和图案

• 批准号: 0010077
• 负责人: Chien Wu
• 金额: $ 20.8万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0010077&HistoricalAwards=false
• 关键词: Self; Organized; Phases; Patterns; Epitaxial

0010077WuThis theoretical study addresses the formation of quantum dots and wires by self assembly. The study will address the effect of several fabrication parameters on the stability, growth and restructuring of thin multi-component solid films on single-component substrates. Surface and bulk diffusions appear to be two major mechanisms. The effort will begin with a re-derivation of the governing equations for thermochemical responses of multiphase solids under stress. The objective is to recapture the factors that have been heretofore thought to be negligible. More specifically, the theory will be reexamined for completeness and generality in chemical potential, with particular emphasis on the role of mismatch parameter. Analytical considerations will include, but not limited to, the morphological and compositional instabilities of multi-component solids, and the effect of substrate pattern generated by non-lithographic methods, such as the periodic strain field of a buried misfit dislocation network or a compliant substrate, on self-organization. The proposed investigation is expected to have a significant impact on the ongoing effort in producing nano-scale semiconductor islands of uniform size and distribution. Such self-organized small structures are thought to be the future of new electronic devices in just 15 or 20 years when conventional transistors and circuits can not be miniaturized further. In this way, the project will have contributed to the advance of another milestone technology, as well as to the understanding of a new phenomenon in the micron-to-nano range.***

0010077Wu这项理论研究解决了通过自组装形成量子点和线的问题。 该研究将解决几个制造参数对单组分基底上薄的多组分固体薄膜的稳定性、生长和重组的影响。 表面扩散和体扩散似乎是两种主要机制。这项工作将从重新推导应力下多相固体热化学响应的控制方程开始。 目的是重新捕捉迄今为止被认为可以忽略不计的因素。更具体地说，将重新审视该理论在化学势方面的完整性和普遍性，特别强调错配参数的作用。分析考虑因素包括但不限于多组分固体的形态和成分不稳定性，以及非光刻方法生成的衬底图案对自组织的影响，例如掩埋失配位错网络或柔顺衬底的周期性应变场。 拟议的研究预计将对生产尺寸和分布均匀的纳米级半导体岛的持续努力产生重大影响。 这种自组织的小型结构被认为是 15 或 20 年后新型电子设备的未来，届时传统晶体管和电路将无法进一步小型化。 通过这种方式，该项目将为另一项里程碑式技术的进步做出贡献，并有助于理解微米到纳米范围内的新现象。***