Nanomanufacturing of 3D Networks of 2D Materials for High Materials Performance

2D 材料 3D 网络纳米制造，实现高材料性能

• 批准号: 1561839
• 负责人: Sefaattin Tongay
• 金额: $ 20万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1561839&HistoricalAwards=false
• 关键词: Nanomanufacturing; 3D; Networks; 2D; Materials

Atomically thin two-dimensional (2D) materials are a new class of materials that have shown attractive material properties with potential applications in light-conversion and information technologies. For example, 2D materials are extremely flexible due to their membrane-like thin structure, they interact with light very strongly, and their surfaces are good for sensing molecules and gases. They are currently grown in small quantities only on flat surfaces with poor optical performance which greatly limit their potential. Their successful integration into real-life applications, however, requires new scalable manufacturing technologies capable of producing high quality and high performance 2D materials in large quantities. This award will pave the way to manufacture three-dimensional (3D) networks of 2D materials by conformably coating 2D layers onto 3D substrates by scalable and cost-effective nanomanufacturing techniques. This project will allow large scale manufacturing of 2D material fibers and enable many new applications of atomically thin materials. Additionally, this project includes educational outreach, with a strong emphasis on bringing an understanding of nanoscience and 2D materials to the general public through free open house events and other activities. It will also give hands-on research opportunities to underrepresented groups and minority students. Pound-for-pound atomically thin 2D materials, such as MoS2, have the potential to generate three-orders of magnitude energy compared to conventional materials such as Si or GaAs. However, when they are grown in planar form, their optical performance greatly suffers from their extreme thinness. This award tackles this problem from a nanomanufacturing point of view by constructing 3D networks of 2D materials. Deposition of 2D materials in 3D geometry has distinct advantages over planar ones as their total surface area, material quantity, and optical performance (absorption and emission) can be increased significantly. However, no systematic studies exist to date on the nanomanufacturing of 3D networks of 2D materials. The research team aims to close the knowledge gap by coating individual electrospun nanofibers with 2D sheets using a cost-effective, reliable, and scalable electrospinning process. Electrospinning is used to produce polymeric alumina nanofibers, which are then crystallized by thermal annealing into desired crystalline phases for successful 2D deposition. Lastly, 2D materials are deposited using a scalable chemical vapor deposition (CVD) process. Material performance of manufactured networks will be tested and techniques will be combined into traditional CVD and electrospinning techniques to realize 2D systems for practical applications.

原子薄二维（2D）材料是一类新型材料，它表现出有吸引力的材料特性，在光转换和信息技术方面具有潜在的应用前景。例如，二维材料由于其膜状薄结构而非常灵活，它们与光的相互作用非常强烈，并且它们的表面适合传感分子和气体。目前它们仅在平坦的表面上少量生长，光学性能较差，这极大地限制了它们的潜力。然而，要将它们成功集成到现实生活中，需要能够大批量生产高质量和高性能二维材料的新的可扩展制造技术。该奖项将为通过可扩展且经济高效的纳米制造技术将 2D 层均匀地涂覆到 3D 基材上来制造 2D 材料的三维 (3D) 网络铺平道路。该项目将实现二维材料纤维的大规模制造，并使原子级薄材料的许多新应用成为可能。此外，该项目还包括教育推广，重点是通过免费的开放日活动和其他活动让公众了解纳米科学和二维材料。它还将为代表性不足的群体和少数族裔学生提供实践研究的机会。与 Si 或 GaAs 等传统材料相比，MoS2 等原子级厚度的二维材料有可能产生三个数量级的能量。然而，当它们以平面形式生长时，它们的光学性能因其极薄而受到极大影响。该奖项通过构建 2D 材料的 3D 网络，从纳米制造的角度解决了这个问题。在 3D 几何结构中沉积 2D 材料比平面材料具有明显的优势，因为它们的总表面积、材料数量和光学性能（吸收和发射）可以显着增加。然而，迄今为止，还没有关于 2D 材料 3D 网络纳米制造的系统研究。研究团队的目标是通过使用经济高效、可靠且可扩展的静电纺丝工艺，用二维片材涂覆单个静电纺丝纳米纤维，从而缩小知识差距。静电纺丝用于生产聚合氧化铝纳米纤维，然后通过热退火将其结晶成所需的晶相，以成功进行二维沉积。最后，使用可扩展的化学气相沉积 (CVD) 工艺沉积二维材料。将测试制造网络的材料性能，并将技术与传统的 CVD 和静电纺丝技术相结合，以实现实际应用的 2D 系统。