Atomic-Layer Dependent Adhesion of Two-Dimensional Transitional Metal Carbides (MXenes)

二维过渡金属碳化物 (MXenes) 的原子层依赖性粘附

• 批准号: 2414708
• 负责人: Chenglin Wu
• 金额: $ 40.8万
• 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: 2023-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2414708&HistoricalAwards=false
• 关键词: Atomic; Layer; Dependent; Adhesion; Two

A novel large family of low dimensional materials, 2D transition metal carbides (MXenes), have shown excellent electronic and optical properties that are often superior compared to other 2D materials. Importantly and in contrast to other 2D materials, these properties can be systematically varied and studied within the same family, without changing elemental composition and type of interatomic bonds in the material. These unique features make MXenes equally interesting for fundamental science and application development, where they can be used in new planar and flexible devices, leading to new technologies and significant economic impacts. Some of these applications that are researched now include health monitoring sensors, high performance energy harvesting and storage systems, and chemo-photothermal cancer therapy. However, the adhesion of MXenes, which is critical in many of these applications, has yet to be systematically investigated. To date, there have only been a few theoretical studies of the adhesive behavior of MXenes, with little to no experimental data. In a broader sense, experimental determination of adhesive properties of MXenes will contribute to our understanding of the fundamental relationships between adhesion and atomic structures for low dimensional materials. This could revolutionize the modern materials and manufacturing industries in harnessing the adhesion for coatings and planar devices made of low dimensional materials.The goals of the project are to: (i) systematically investigate the adhesive interactions of MXenes at the atomistic, nano- and micrometer scales, (ii) using the unique advantages provided by MXenes, systematically and separately examine the effects of surface functional groups and monolayer thickness of 2D materials on their adhesive interactions, and (iii) explore the environmental effects on the adhesion of MXenes including surface water and oxidation process. To achieve the goals, we intend to: (1) utilize the atomistic scale contact-based experiments to investigate the effect of atomic structures and surface terminations on the adhesion, (2) employ nanoindentation to understand the interfacial traction-separation relations of MXenes with themselves and other materials, (3) explore the potential use of in-situ nano-shear-lag experiments to investigate the shear interactions of MXenes, (4) combine the multiscale modeling and the experimental results to understand the coupled adhesive mechanisms involving the surface defects, terminations, monolayer thickness, and (5) explore the possible evaluation of the effects of surface water and oxidation process on the adhesion of MXenes.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.

一个新型的低维材料的大型家族，即2D过渡金属碳化物（MXENES），显示出与其他2D材料相比，通常具有出色的电子和光学特性。重要的是，与其他2D材料形成鲜明对比的是，这些特性可以在同一家族中系统地变化和研究，而不会改变材料中原子质键的元素组成和类型。这些独特的功能使MXENES在基本的科学和应用开发中同样有趣，可以在新的平面和灵活的设备中使用它们，从而产生新的技术和重大的经济影响。现在研究的其中一些应用包括健康监测传感器，高性能能源收集和储存系统以及化学治疗癌症治疗。但是，在许多这些应用中至关重要的MXENES的粘附尚未系统地研究。迄今为止，只有少数关于MXENES粘附行为的理论研究，几乎没有实验数据。从广义上讲，MXENES的粘附性能的实验性确定将有助于我们对低维材料的粘附与原子结构之间的基本关系的理解。这可能会彻底改变现代材料和制造业在利用由低维材料制成的涂料和平面设备的粘合度。该项目的目标是：（i）系统地研究MXENES在原子，纳米和微米尺度上的MXENES的粘合性相互作用，（ii）使用MXENES和MONOLSAILS YORMATINAL，MONTARINES falctions of Systearty of Systearty of Systearty of Systey of system and systearty效果，并具有系统的效果。其粘合性相互作用的材料，（iii）探索了包括地表水和氧化过程在内的MXENES粘附的环境影响。 To achieve the goals, we intend to: (1) utilize the atomistic scale contact-based experiments to investigate the effect of atomic structures and surface terminations on the adhesion, (2) employ nanoindentation to understand the interfacial traction-separation relations of MXenes with themselves and other materials, (3) explore the potential use of in-situ nano-shear-lag experiments to investigate the shear interactions of MXenes, （4）结合多尺度建模和实验结果，以了解涉及表面缺陷，终止，单层厚度的耦合粘合机制，以及（5）（5）探索对地表水和氧化过程的影响的可能评估。影响审查标准。