Nanostructured surfaces: growth processes and patterns, new electronic and optical materials

纳米结构表面：生长过程和图案、新型电子和光学材料

• 批准号: 46683-2010
• 负责人: McLean, Alastair
• 金额: $ 2.84万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=475150
• 关键词: Nanostructured; surfaces; growth; processes; patterns

The quantum theory of electrons in solids was initially tested using high-purity single crystals that have full three-dimensional symmetry. Subsequently, Cho and Arthur of Bell Laboratories developed a method, called molecular beam epitaxy, for growing multilayer materials. The study of electron motion in these two-dimensional systems led to the discovery of new physics that included the quantum hall effect, the fractional quantum hall effect and giant magnetoresistance. The challenging problem of controlling the architecture of materials at the atomic and molecular level is now being addressed. The primary aim of the emerging field of nano-architectonics is to assemble individual atoms and molecules into novel structural architectures that have tailored electronic, optical and magnetic properties. In this proposal, new methodologies will be developed for assembling novel nano-structured surfaces using materials commonly used to make electronic devices (Si and Ge) and organic light emitting devices (organoborons and porphyrins). These projects will allow a new generation of scientists to be trained in electronic and optical material growth. We will use molecular beam epitaxy and self-assembly methods to grow two-dimensional atomic crystals of Ge and Si, in the graphene crystal structure. These structural polymorphs will have novel electronic properties. Single molecule luminescence spectroscopy will be used to develop robust new methods for fabricating luminescent thin films with high luminescent efficiency. New methodologies, recently developed in my group, for assembling molecular lattices on Si surfaces using strong covalent binding and steric hindrance will be extended to create new structurally ordered organic/inorganic interfaces. Atomistic studies of domain growth will also be performed in a model system to gain insight into the mechanisms by which high-quality electronic materials can be grown. These studies will provide fundamental insight into how optical and electronic material properties can be tailored using atomic and molecular-scale structural control.

固体中电子的量子理论最初是使用具有完全三维对称性的高纯度单晶进行测试的。随后，贝尔实验室的 Cho 和 Arthur 开发了一种称为分子束外延的方法，用于生长多层材料。对这些二维系统中电子运动的研究导致了新物理学的发现，其中包括量子霍尔效应、分数量子霍尔效应和巨磁阻。现在正在解决在原子和分子水平上控制材料结构的挑战性问题。纳米结构学新兴领域的主要目标是将单个原子和分子组装成具有定制电子、光学和磁性特性的新型结构体系。在该提案中，将开发新的方法，使用常用于制造电子器件（硅和锗）和有机发光器件（有机硼和卟啉）的材料组装新型纳米结构表面。这些项目将使新一代科学家能够接受电子和光学材料生长方面的培训。我们将使用分子束外延和自组装方法在石墨烯晶体结构中生长Ge和Si的二维原子晶体。这些结构多晶型物将具有新颖的电子特性。单分子发光光谱将用于开发稳健的新方法来制造具有高发光效率的发光薄膜。我的小组最近开发的利用强共价键和空间位阻在硅表面组装分子晶格的新方法将被扩展以创建新的结构有序的有机/无机界面。还将在模型系统中进行域生长的原子研究，以深入了解高质量电子材料的生长机制。这些研究将为如何利用原子和分子尺度的结构控制来定制光学和电子材料特性提供基础见解。