GOALI: Manufacturing of Two-Dimensional MXene Nanosheets by Salt Solution Etching and Their Solution-based Layer-by-Layer Assembly into Heterostructures

GOALI：通过盐溶液蚀刻制造二维 MXene 纳米片及其基于溶液的逐层组装成异质结构

• 批准号: 2240554
• 负责人: Jodie Lutkenhaus
• 金额: $ 59.95万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-05-01 至 2026-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2240554&HistoricalAwards=false
• 关键词: GOALI; Manufacturing; Two; Dimensional; MXene

MXenes are a broad family of two-dimensional (2D) ceramic nanosheets with a wide compositional diversity and tailorability of properties for a broad range of practical applications, including energy storage, catalysis, electromagnetic interference shielding, sensors, composites, and batteries. However, challenges in the advanced manufacturing of MXenes prevent widespread production and use. Manufacturing challenges include (i) difficulties in synthesizing MAX phases beyond titanium aluminum carbide, (ii) the use of hazardous acids in the synthesis, (iii) a lack of chemical stability, particularly in aqueous or humid environments, and (iv) adhesion and control in functional films and coatings. This Grant Opportunity for Academic Liaison with Industry (GOALI) award supports fundamental research to provide the knowledge needed to meet these challenges. This project involves new synthesis and processing avenues that enable the scalable nanomanufacturing of new MXene compositions while preventing degradation and new methods of controlled layer-by-layer assembly of MXenes in functional coatings. A special emphasis is placed on coating assembly features such as tunable optoelectronic properties. Additionally, education objectives include (1) mentoring undergraduate and graduate students alongside the GOALI industry partner, and (2) engaging the broader community via 2D nanomaterial-focused curriculum enhancements, a joint industry-government-academic workshop, and K-12 outreach.The technical approach to meeting the challenges with advanced manufacturing of MXene nanosheets includes experimental advances in their synthesis, etching, and assembly. In one objective, this project utilizes alternative etchants such as molten salt solutions for one-step HF-free synthesis of next-generation MXenes with a focus on how etchant type and etching conditions affect MXene yield, quality, and stability against chemical degradation. In another objective, this project creates layer-by-layer-assembled heterostructured functional coatings containing these next-generation MXenes. The focus of this objective is on the water-based solution assembly of MXenes into unique heterostructured coatings that contain precisely stacked regions of various MXene types with or without polymers. The manufacture of conformal coatings with alternating blocks of polymer and MXene allows for tailored optoelectronic properties leading to applications such as Shottky junctions, Bragg reflectors, and optical filters. In addition, this GOALI project has a partnership with Lynntech for added expertise in scalability of MXene production and advanced manufacturing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

MXene 是一个广泛的二维 (2D) 陶瓷纳米片系列，具有广泛的成分多样性和可定制的性能，适用于广泛的实际应用，包括能量存储、催化、电磁干扰屏蔽、传感器、复合材料和电池。然而，MXene 先进制造方面的挑战阻碍了其广泛生产和使用。制造挑战包括（i）合成碳化钛铝以外的 MAX 相的困难，（ii）在合成中使用有害酸，（iii）缺乏化学稳定性，特别是在水性或潮湿环境中，以及（iv）功能薄膜和涂层的粘附和控制。这项与行业学术联络的资助机会 (GOALI) 奖项支持基础研究，以提供应对这些挑战所需的知识。该项目涉及新的合成和加工途径，可实现新型 MXene 组合物的可扩展纳米制造，同时防止降解，以及在功能涂层中控制 MXene 逐层组装的新方法。特别强调涂层组装特性，例如可调光电特性。此外，教育目标包括 (1) 与 GOALI 行业合作伙伴一起指导本科生和研究生，以及 (2) 通过以 2D 纳米材料为中心的课程强化、行业-政府-学术联合研讨会和 K-12 外展，吸引更广泛的社区参与。应对 MXene 纳米片先进制造挑战的技术方法包括合成、蚀刻和生产方面的实验进展。 集会。该项目的一个目标是利用熔盐溶液等替代蚀刻剂一步式无氢氟酸合成下一代 MXene，重点研究蚀刻剂类型和蚀刻条件如何影响 MXene 产量、质量和化学降解稳定性。该项目的另一个目标是创建包含这些下一代 MXene 的逐层组装异质结构功能涂层。该目标的重点是将 MXene 的水基溶液组装成独特的异质结构涂层，该涂层包含各种 MXene 类型（带或不带聚合物）的精确堆叠区域。使用聚合物和 MXene 交替块制造保形涂层可实现定制的光电特性，从而实现肖特基结、布拉格反射器和滤光片等应用。此外，该 GOALI 项目与 Lynntech 建立了合作伙伴关系，以增加 MXene 生产和先进制造可扩展性方面的专业知识。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。