CAREER: Fabricating Free-Standing Three-Dimensional Graphene Nanostructures through Functionalization, Folding, and Self-Assembly

职业：通过功能化、折叠和自组装制造独立式三维石墨烯纳米结构

• 批准号: 1454293
• 负责人: Jeong-Hyun Cho
• 金额: $ 50万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2020-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1454293&HistoricalAwards=false
• 关键词: CAREER; Fabricating; Free; Standing; Three

This Faculty Early Career Development (CAREER) grant will build a methodology for the fabrication of free-standing, three-dimensional (3D), functionalized, graphene structures. 3D graphene structures have been of great interest in the last few years because of their unique properties and behaviors, which are different from two-dimensional (2D) graphene nanosheets. 3D graphene structures can lead to applications in optics, electronics, optoelectronics, and biomedical devices, which cannot be realized with 2D graphene structures. One of the useful characteristics of graphene-based materials is tunability of their physical and chemical properties through functionalization. Currently, functionalization of 3D graphene-based materials does not exist, because conventional lithographic techniques such as electron beam lithography, photolithography, and nanoimprint lithography are 2D methods which allow patterning and functionalizing only on planar substrates. This research plan seeks to develop nanomanufacturing processes and demonstrate that 3D polyhedral graphene structures can be realized with individually functionalized graphene nanosheets on each face of the 3D structures. The impact of the proposed work is the discovery of knowledge that can be harnessed in developing next-generation 3D nanoelectronics, 3D multi-channel filtering devices, and nanomedical sensors beneficial to human health. The goal of this award is to demonstrate the unique properties of 3D graphene materials not observed in 2D graphene nanosheets. The heterogeneous 3D functionalization will be accomplished through doping and surface patterning on the 3D structures, which will alter the physical and chemical properties of the 3D nanostructures, leading to a new generation of 3D devices. The specific research interests and CAREER objectives encompass the following: (a) develop a self-assembly and folding processes to transform 2D structures into 3D devices, overcoming the limitations of the conventional lithographic processes and allowing for the creation of free-standing 3D graphene-based (graphene and graphene oxide) polyhedral and nanotube arrays; (b) realize heterogeneous functionalization on the 3D graphene structures, with each graphene-based membrane defining each face of the 3D polyhedron structure and functionalized for specific functionalities; (c) apply the self-assembly process in the development of 3D graphene-based sensors and devices. This work will contribute to solving major problems with using 2D materials and bring significant advances in the development of next-generation nano-enabled devices.

该教师早期职业发展 (CAREER) 资助将建立一种制造独立式三维 (3D) 功能化石墨烯结构的方法。 3D 石墨烯结构由于其不同于二维 (2D) 石墨烯纳米片的独特性质和行为，在过去几年中引起了人们的极大兴趣。 3D石墨烯结构可以在光学、电子学、光电子学和生物医学设备中实现应用，这是2D石墨烯结构无法实现的。石墨烯基材料的有用特性之一是通过功能化调节其物理和化学性质。目前，3D石墨烯基材料的功能化还不存在，因为传统的光刻技术（例如电子束光刻、光刻和纳米压印光刻）是2D方法，只能在平面基板上进行图案化和功能化。该研究计划旨在开发纳米制造工艺，并证明 3D 多面体石墨烯结构可以通过 3D 结构每个面上的单独功能化的石墨烯纳米片来实现。拟议工作的影响是发现可用于开发下一代 3D 纳米电子学、3D 多通道过滤设备和有益于人类健康的纳米医学传感器的知识。该奖项的目的是展示 2D 石墨烯纳米片中未观察到的 3D 石墨烯材料的独特性能。异质3D功能化将通过3D结构上的掺杂和表面图案化来实现，这将改变3D纳米结构的物理和化学性质，从而产生新一代3D器件。具体的研究兴趣和职业目标包括以下内容：（a）开发自组装和折叠工艺，将 2D 结构转变为 3D 器件，克服传统光刻工艺的局限性，并允许创建独立的 3D 石墨烯基（石墨烯和氧化石墨烯）多面体和纳米管阵列； (b) 在 3D 石墨烯结构上实现异质功能化，每个石墨烯基膜定义 3D 多面体结构的每个面，并针对特定功能进行功能化； (c) 将自组装工艺应用于基于 3D 石墨烯的传感器和设备的开发。这项工作将有助于解决使用二维材料的主要问题，并为下一代纳米设备的开发带来重大进展。