Graphene Heteromaterials

技术描述：二维纳米材料具有新型电子学的潜力。然而，将不同的二维（2D）纳米材料制造和融合到一个器件中的材料科学尚未建立。该项目旨在利用原子尺度表面科学表征技术了解二维纳米材料界面的基本材料科学问题。该研究包括三个重点领域：(i)金属-石墨烯界面的研究和调谐：与石墨烯的电接触对任何设备都很重要。提出了利用石墨烯支撑的二维金属有机骨架在石墨烯表面分散金属原子的新策略。（ii）开发合成二维材料异质结构和表征其性质的方法：为了在晶圆尺寸的尺度上在石墨烯上获得六方氮化硼（h-BN）的异质层，将h-BN在金属载体上的气相生长与从金属体中分离碳形成石墨烯相结合。（iii）合成和表征没有块体材料结构相似的新型二维人造纳米材料：大多数二维纳米材料是基于范德瓦尔斯块体材料，可以剥离成单个原子（分子）片。在这个项目中，我们探索了合成全新材料的可能性，这种材料没有任何块状的对应物。非技术描述：本项目解决石墨烯及相关二维材料的基础材料科学问题。各种二维材料的生长和表征他们的界面使用表面科学技术进行。本项目的研究成果将纳入PI教授的材料物理/表面科学和固体物理课程。此外，该项目还为两名博士生提供研究生项目，为本科生提供研究经验。它还促进了南佛罗里达大学和布鲁克海文国家实验室功能纳米材料中心的研究人员之间最近实施的合作的继续。

Technical Description: Two-dimensional nanomaterials have potential for novel electronics. However the materials science of fabricating and merging of different two-dimensional (2D) nanomaterials into a device has not yet been established. This project aims at understanding fundamental materials science problems of 2D-nanomaterial interfaces using atomic-scale surface science characterization techniques. The research consists of three thrust areas: (i) Investigation and tuning of metal- graphene interfaces: Electrical contacts with graphene are important for any device. New strategies are devised on how to disperse metal-atoms on the surface of graphene by utilizing two-dimensional metal-organic frameworks supported on graphene. (ii) Developing methods for synthesizing heterostructures of 2D materials and characterizing their properties: To achieve heterolayers of hexagonal boron nitride (h-BN) on graphene on a wafer-sized scale vapor growth of h-BN on a metal support is combined with graphene formation by carbon segregation from the metal bulk. (iii) Synthesizing and characterizing novel 2D man-made nanomaterials with no structural analogy in bulk materials: Most 2D nanomaterials are based on van-der-Waals bulk materials that can be exfoliated into individual atomic (molecular) sheets. In this project the possibility of synthesizing entirely new materials that do not have any bulk counterparts is explored.Non-technical Description: This project addresses fundamental materials science issues of graphene and related two-dimensional materials. Growth of various two-dimensional materials and characterization their interfaces are carried out using surface science techniques. Research results from this project will be included in the curriculum of courses on Materials Physics/Surface Science and Solid State Physics taught by the PI. In addition, this project offers graduate projects for two PhD students and research experience for undergraduate students. It also facilitates the continuation of a recently implemented cooperation between researchers at the University of South Florida and the Center for Functional Nanomaterials at the Brookhaven National Laboratory.