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用具有完整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，包括量子霍尔效应、分数量子霍尔效应和巨磁阻。在原子和分子水平上控制材料结构这一具有挑战性的问题正在得到解决。纳米建筑学这一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、光学和磁性质的新型结构结构。在本提案中，将开发新的方法来组装新的纳米结构表面，使用通常用于制造电子器件（Si和Ge）和有机发光器件（有机硼和卟啉）的材料。这些项目将使新一代科学家在电子和光学材料生长方面得到培训。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锗和硅的二维原子晶体。这些结构多晶将具有新颖的电子特性。单分子发光光谱学将为制备具有高发光效率的发光薄膜提供可靠的新方法。我的小组最近开发的利用强共价结合和位阻在Si表面组装分子晶格的新方法将扩展到创建新的结构有序的有机/无机界面。区域生长的原子研究也将在模型系统中进行，以深入了解高质量电子材料生长的机制。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本的见解。