LEAPS-MPS: Tailoring the Thermal Properties of Flexible Two-Dimensional (2D) Heterostructures

LEAPS-MPS：定制柔性二维 (2D) 异质结构的热性能

• 批准号: 2137883
• 负责人: Xian Zhang
• 金额: $ 25万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137883&HistoricalAwards=false
• 关键词: LEAPS; MPS; Tailoring; Thermal; Properties

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). NONTECHNICAL DESCRIPTION. Recent advances in atomically thin crystals derived from layered materials have enabled the creation of two-dimensional (2D) heterostructures with unique properties. These heterostructures have a variety of applications, including wearable devices, microelectronics cooling, and generation of electricity from waste heat (thermoelectricity). One challenge for flexible electronics based on 2D materials is managing heat under mechanical stress while maintaining performance. Further innovations require an efficient thermal control strategy to address this issue. The objective of this project is to examine the fundamental aspects of thermal transport in 2D heterostructures and achieve efficient thermal control via structural tailoring. This research advances the current frontiers of two-dimensional materials and devices. This study is expected to elucidate the essential thermal physics and open a new route for the exploration of future electronics by leveraging unique thermal properties of 2D materials and structures. This work addresses the grand challenge of global sustainable energy solutions by enabling innovative design solutions of electronic devices. The project will use thermal technology as a motivator to engage students via interactive games about the wave nature of thermal transport, workshops and curriculum crosslinking art and engineering, and mentorships for women students. The PI will work with a broad range of students, from K-12 to graduate students, with students with developmental delays and those underrepresented in STEM. This project will generate extraordinary materials and inspire students through educational activities. TECHNICAL DESCRIPTION. The research objective of this project is to investigate and control the fundamental thermal behavior in two-dimensional heterostructures via structural tailoring. Understanding structural effects on thermal properties will be harnessed to derive a learning-based framework and directly validated by experiments. Experimental approaches of materials synthesis, device nanofabrication and thermal characterization are emphasized and reinforced by analytical modeling and computer simulations. Specifically, a dual laser at same side opto-thermal Raman technique will be used to perform direction-dependent and anisotropic thermal characterizations on structurally tailored two-dimensional heterostructures. The proposed research activities, aiming at investigating new thermal physics and developing novel device technological precursors, provide a firsthand, in-depth understanding of how to control thermal behavior of two-dimensional materials via structural tailoring and provide a pathway to the development of innovative two-dimensional heterostructure devices with ultra-efficient performance. The outcome of this project is expected to be a major leap in fundamental understanding of structure-thermal couplings, enabling unprecedented thermal control methods, and revolutionize future electronic platforms.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.

该奖项是根据2021年《美国救援计划法》（公法117-2）全部或部分资助的。非技术描述。从分层材料衍生的原子薄晶体的最新进展使创建具有独特特性的二维（2D）异质结构。这些异质结构具有多种应用，包括可穿戴设备，微电子冷却以及从废热（热电学）发电的发电。基于2D材料的灵活电子设备的一个挑战是在机械压力下管理热量，同时保持性能。进一步的创新需要有效的热控制策略来解决此问题。该项目的目的是检查2D异质结构中热传输的基本方面，并通过结构剪裁实现有效的热控制。这项研究推进了当前二维材料和设备的前沿。预计这项研究将阐明基本的热物理学，并通过利用2D材料和结构的独特热性能来探索未来电子产品的新途径。这项工作通过启用电子设备的创新设计解决方案来解决全球可持续能源解决方案的巨大挑战。该项目将使用热技术作为动机，通过互动游戏吸引学生，讲述热运输，讲习班和课程交联的艺术和工程以及女学生的指导。 PI将与从K-12到研究生的各种学生，具有发育延迟的学生和STEM的代表性不足的学生。该项目将产生非凡的材料，并通过教育活动激发学生。技术描述。该项目的研究目的是通过结构调整调查和控制二维异质结构中的基本热行为。了解对热性能的结构影响将被利用，以得出基于学习的框架并通过实验直接验证。通过分析建模和计算机模拟，强调和加强了材料合成，装置纳米化和热表征的实验方法。具体而言，在同一侧光 - 热拉曼技术处的双激光器将用于在结构定制的二维异质结构上执行方向依赖性和各向异性热特性。提出的研究活动旨在研究新的热物理学并开发新型的设备技术先驱，并深入了解如何通过结构剪裁来控制二维材料的热行为，并为具有超高性能的创新二维异质结构设备提供开发的途径。预计该项目的结果将是对结构 - 热耦合的基本了解，实现前所未有的热控制方法的重大飞跃，并彻底改变了未来的电子平台。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力和更广泛影响的评估来评估的支持。

项目成果

On the role of crystal defects on the lattice thermal conductivity of monolayer WSe2 (P63/mmc) thermoelectric materials by DFT calculation

• DOI: 10.1016/j.spmi.2021.107057
• 发表时间: 2021-07
• 期刊: Superlattices and Microstructures
• 影响因子: 3.1
• 作者: Yingtao Wang;Xian Zhang