Microscopy of Hierarchical 2-D Interface Structures

****技术摘要****该项目的目的是制造低维界面结构，使新型物质的创造和新的纳米级现象的观察成为可能。这些现象包括原子、分子和纳米晶体之间的相互作用，这些相互作用是由石墨烯和氮化硼（BN）的二维层之间的界面定义的低维环境。该计划将采用新开发的技术来操纵单层石墨烯和BN，以制造低维界面结构，并使用扫描隧道显微镜和透射电子显微镜技术对其进行表征。界面结构将用原子、分子和纳米晶元素的组合来装饰，这些元素通过真空沉积和基于溶剂的自旋涂层技术沉积。这些结构将允许探索全新的跨膜化学键和可调谐的纳米级电磁行为。研究生、本科生和博士后研究人员将参与这项研究的各个层面，并将获得最先进的纳米制造和显微镜技术方面的培训。该项目将为高中生提供实习机会，以促进科学领域的招聘。****非技术摘要****该项目旨在表征通过在石墨烯和氮化硼（BN）的二维层之间捕获原子和纳米级颗粒而制成的新型微观结构。由于石墨烯和氮化硼层只能制成一个原子厚度，因此膜两侧的颗粒会相互强烈作用，从而以以前未观察到的方式改变其整体性能。捕获在这些膜之间的界面上的粒子将在不同类型的高分辨率电子显微镜下可见，从而可以测量它们的详细行为。这将允许创建新型二维材料，其性质可以调整为以前从未获得的有用机制（例如，包括其光学，电子和磁性行为）。这种材料有望在未来的电子设备中发挥作用，也可用于制造具有高度理想性能的新表面涂层。研究生、本科生和博士后研究人员将参与这项研究的各个层面，并将获得最先进的纳米结构制造和显微镜技术方面的培训。该项目将为高中生提供实习机会，以促进科学领域的招聘。

****Technical Abstract****The purpose of this project is to fabricate low-dimensional interface structures that enable the creation of new types of matter and the observation of new nanoscale phenomena. Such phenomena include interactions between atoms, molecules, and nanocrystals in low-dimensional environments defined by the interfaces between 2D layers of graphene and boron nitride (BN). This program will employ newly developed techniques for manipulating single layers of graphene and BN in order to fabricate low dimensional interface structures and to characterize them using scanning tunneling microscopy and transmission electron microscopy techniques. Interface structures will be decorated with a combination of atoms, molecules, and nanocrystal elements deposited via vacuum deposition and solvent-based spin-coating techniques. These structures will allow the exploration of completely new transmembrane chemical bonding and tunable electromagnetic behavior at the nanoscale. Graduate students, undergraduates, and postdoctoral researchers will be engaged at every level of this research, and will obtain training in state-of-the-art nanofabrication and microscopy techniques. High school students will be offered internships in this program to promote recruitment into the sciences.****Non-Technical Abstract****This project is aimed at characterizing new types of microscopic structures made by trapping atoms and nanometer-sized particles between two-dimensional layers of graphene and boron nitride (BN). Because the graphene and BN layers can be made only one-atom-thick, particles on either side of these membranes will interact strongly with one another, thus changing their overall properties in ways that have not been previously observed. Particles trapped at the interfaces between such membranes will be visible to different types of high-resolution electron microscopy, allowing their detailed behavior to be measured. This will allow the creation of new types of two-dimensional materials whose properties can be tuned into useful regimes that have never before been accessible (including, for example, their optical, electronic, and magnetic behavior). Such materials are expected to be useful in future electronic devices and also for creating new surface coatings with highly desirable properties. Graduate students, undergraduates, and postdoctoral researchers will be engaged at every level of this research, and will obtain training in state-of-the-art nanostructure fabrication and microscopy techniques. High school students will be offered internships in this program to promote recruitment into the sciences.