Solution-Processed Monodisperse Nanoelectronic Heterostructures

溶液处理的单分散纳米电子异质结构

• 批准号: 1505849
• 负责人: Mark Hersam
• 金额: $ 37.5万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1505849&HistoricalAwards=false
• 关键词: Solution; Processed; Monodisperse; Nanoelectronic; Heterostructures

Nontechnical Description: With the increasing importance of portable and wearable electronic technologies, new materials are needed that combine superlative electronic properties with other requirements such as mechanical flexibility, low power consumption, and scalable manufacturing. Emerging two-dimensional nanoelectronic materials that are atomically thin meet many of these requirements, but no single material can achieve all of them concurrently. Consequently, this project develops heterostructures that synergistically integrate the desirable properties of multiple two-dimensional nanoelectronic materials, thus overcoming the design tradeoffs imposed by single materials utilized in isolation. Solution-processing methods are further employed to achieve highly homogenous nanoelectronic heterostructures in a manner that is compatible with large-scale, low-cost additive manufacturing. The results of this project are disseminated through a comprehensive set of education and outreach activities that include graduate curriculum development, undergraduate laboratories, and a materials science exhibit at the Chicago Museum of Science and Industry.Technical Description: To realize reproducibly high performance in electronic and optoelectronic devices, nanoelectronic materials must be produced via scalable methods that possess high structural monodispersity. Furthermore, the resulting nanoelectronic material components need to be assembled into morphologies that preserve their superior properties and are amenable to subsequent fabrication methods. Towards these goals, dispersion chemistries, solvents, and density gradient media are identified that enable density gradient ultracentrifugation sorting of transition metal dichalcogenides, boron nitride, and black phosphorus with exceptional structural and electronic purities. These high purity samples facilitate fundamental studies of two-dimensional nanoelectronic materials as a function of structural parameters such as thickness and lateral size. In addition, homogeneous two-dimensional nanomaterial dispersions are assembled via vacuum filtration and layer-by-layer assembly to form multi-component bulk heterojunction nanocomposite films and thin-film heterostructures that are suitable for the fabrication and testing of large-area nanoelectronic devices and circuits. In this manner, the role of surface and interfacial chemistry on electronic properties are elucidated at the two-dimensional limit.

非技术描述：随着便携式和可穿戴电子技术的重要性，需要新材料将最高的电子特性与其他要求（例如机械灵活性，低功耗和可扩展制造）相结合。在原子上稀薄的新兴二维纳米电源材料符合许多要求，但没有任何单一材料可以同时实现所有材料。因此，该项目开发了异质结构，从而协同整合了多种二维纳米电源材料的理想特性，从而克服了由隔离中使用的单个材料实施的设计权衡。进一步采用了解决方案处理方法，以与大规模，低成本的增材制造兼容的方式实现高度同质的纳米异质结构。该项目的结果是通过一系列全面的教育和外展活动来传播的，包括研究生课程发展，本科实验室以及在芝加哥科学和工业博物馆展出的材料科学展览。技术描述：在电子和光电设备，纳尼克洛尼克的材料中实现可重复的高性能，可以通过稳定的材料来实现高效果。此外，需要将所得的纳米元素材料成分组装成形态，以保留其出色的特性，并且可以适合随后的制造方法。为了这些目标，鉴定出分散化学，溶剂和密度梯度培养基，可以使过渡金属二甲化合物，硝化硼和黑磷具有卓越的结构和电子纯度的密度梯度超速离心排序。这些高纯度样品促进了二维纳米电源材料的基础研究，这是结构参数（例如厚度和侧向尺寸）的函数。 此外，通过真空过滤和逐层组装组装均匀的二维纳米材料分散，以形成多组分的散装异质结纳米复合膜和薄膜异质结构，这些薄膜适用于大型纳米纤维纤维的制造和测试。 以这种方式，表面和界面化学对电子特性的作用以二维极限阐明。