EFRI 2-DARE: Scalable Synthesis of 2D Layered Materials for Large Area Flexible Thin Film Electronics

该项目将研究一种方法，将悬浮在液体中的纳米板组装成电子级的二维连续层状材料薄膜。这种工艺有望大大降低生产这种薄膜和由其生产的设备的成本。该方法具有生产化学成分、结构和尺寸控制良好的材料的潜力，可用于电子学、光电子学、生物电子学、能量转换和能量存储。拟议的研究方案将与教育和外联活动密切结合。我们会积极招募弱势群体的学生，扩大他们参与工程研究的机会，并把研究成果纳入研究生和本科生课程，进一步扩大受教育的机会。总之，这些努力将为教育和培训下一代人才做出重大贡献，为迎接新世纪的挑战做好准备，包括保持美国技术的竞争优势。二维层状材料（2DLMs）作为一类独特的材料正在崛起，为基础材料科学和全新技术的新突破奠定了基础。为了充分挖掘其潜力，需要可扩展的2dlm生产，理想情况下采用相对简单、低成本的方法。提出了一种可扩展合成和组装2DLM纳米板的溶液化学途径，作为电子、催化和能源应用的新材料平台。特别是，分子进化方法将用于鉴定和设计特定的分子调节剂，用于溶液合成2DLM纳米板，并确定控制所有材料参数，包括化学成分，物理尺寸和电子性质。原位透射电子显微镜和原位原子力显微镜将用于可视化和理解成核和生长动力学，以便在原子水平上精细控制二维晶体的形成。系统的研究将探索2DLM纳米片的基本电子特性，并探索在2DLM异质结构界面上产生的新物理现象。将探索2DLM纳米板薄膜的大面积组装，横向外延生长以减少或消除晶界，以及新器件架构的设计，以创造新一代高柔性电子和光电子器件。最后，将研究所得的2DLM纳米板作为电催化剂或光催化剂或储能应用的潜在应用。对成核和生长机制的基本理解将有助于开发强大的合成策略，用于可扩展生产具有所有材料参数确定性控制的2dlm，为单原子厚度限制下的低维物理和化学的基础研究创建一个强大的材料系统。这项工作将为2dlm的新材料平台建立关键的知识基础，以实现包括电子、光电子、催化、能量转换和存储在内的各种技术的变革性进步。

This project will research an approach for assembling electronics-grade, continuous films of two-dimensional layered materials from nanoplates suspended in liquids. Such a process promises to dramatically reduce the cost of producing such films and the devices that are produced from them. The method has the potential to produce materials with good control of chemical composition, structure and dimensions for applications in electronics, optoelectronics, bioelectronics, energy conversion and energy storage. The proposed research program will be closely integrated with education and outreach activities. Students from underrepresented groups will be actively recruited to broaden their participation in engineering research and the research results will be integrated into graduate and undergraduate courses to further broaden educational opportunities. Together, these efforts will contribute significantly to education and training of the next generation of individuals ready to meet the challenges of the new century, including maintaining a competitive advantage for US technology.Two-dimensional layered materials (2DLMs) are emerging as a unique class of materials setting the stage for new breakthroughs in fundamental materials science and entirely new technologies. To fully explore their potential requires scalable production of 2DLMs, ideally with relatively simple, low cost approaches. A solution chemical pathway to the scalable synthesis and assembly of 2DLM nanoplates is proposed as a new material platform for electronic, catalytic and energy applications. In particular, a molecular evolution approach will be used to identify and design specific molecular regulating agents for the solution synthesis of 2DLM nanoplates with deterministic control of all material parameters, including chemical composition, physical dimension and electronic properties. In-situ transmission electron microscopy and in-situ atomic force microscopy will be used to visualize and understand the nucleation and growth kinetics for fine control of 2D crystal formation at the atomic level. Systematic investigations will be conducted to probe the fundamental electronic properties of the 2DLM nanoplates and explore new physics originating at the interfaces in 2DLM heterostructures. Large-area assembly of 2DLM nanoplate thin films, lateral epitaxial growth to reduce or eliminate the grain boundaries, and design of new device architectures for the creation of a new generation of highly flexible electronic and optoelectronic devices will be explored. Lastly, the resulting 2DLM nanoplates will be investigated for potential applications as electrocatalysts or photocatalysts, or in energy storage applications. A fundamental understanding of the nucleation and growth mechanisms will enable the development of powerful synthetic strategies for scalable production of 2DLMs with deterministic control of all material parameters, creating a robust material system for fundamental investigation of low-dimensional physics and chemistry at the limit of single atomic thickness. The effort will establish the critical intellectual underpinnings for a new material platform of 2DLMs to enable transformative advances in diverse technologies including electronics, optoelectronics, catalysis, and energy conversion and storage.