Graphene Heteromaterials

技术描述：二维纳米材料具有开发新型电子学的潜力。然而，将不同的二维(2D)纳米材料制造和融合成一个装置的材料科学还没有建立起来。该项目旨在利用原子尺度的表面科学表征技术来理解2D-纳米材料界面的基本材料科学问题。这项研究包括三个主要方面：(I)金属-石墨烯界面的调查和调整：与石墨烯的电接触对任何设备都是重要的。利用以石墨烯为载体的二维金属-有机骨架，提出了将金属原子分散在石墨烯表面的新策略。(Ii)二维异质结材料的制备方法及其性能表征：为了在石墨烯上实现晶片尺寸的六方氮化硼(h-BN)异质层，在金属载体上气相生长h-BN与通过碳从金属体内分离形成石墨烯相结合。(3)新型2D人造纳米材料的合成与表征：大多数2D纳米材料是以Van-der-Waals块体材料为基础的，可以剥离成单独的原子(分子)片层。在这个项目中，探索了合成全新材料的可能性，这些材料没有任何块状对应物。非技术描述：这个项目解决了石墨烯和相关的二维材料的基本材料科学问题。各种二维材料的生长和它们的界面的表征是使用表面科学技术进行的。该项目的研究成果将纳入国际物理研究所教授的材料物理/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，并为本科生提供研究经验。它还促进了南佛罗里达大学的研究人员和布鲁克海文国家实验室功能纳米材料中心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.