In Situ TEM and Ex Situ Studies of Two-Dimensional Nanostructured Devices

二维纳米结构器件的原位 TEM 和异位研究

• 批准号: 1905045
• 负责人: Marija Drndic
• 金额: $ 67.27万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905045&HistoricalAwards=false
• 关键词: Situ; TEM; Ex; Studies; Two

Nontechnical Abstract:This NSF project focuses on an experimental investigation of novel two-dimensional nanostructured materials towards the fabrication and synthesis of one-dimensional electronic devices. This research combines fabrication of devices at the atomic scale in ultrathin materials with electrical characterization. The research team aims at advancing synthesis, characterization, and understanding of two-dimensional materials for an atom-by-atom control of structure-property-performance relationships while monitoring the evolution during device heating and electron irradiation and recording key device properties such as electron transport. More broadly, this project has impacts on education (university and K-12 students, on public forums: festivals and museum exhibits) and industry (e.g., on electron microscopy companies). The broader impact also includes the realization of low-dimensional materials and the advancement of devices including miniaturized electronics with improved power consumption. Moreover, this project impacts industries developing on-chip nanoscale devices. Outreach to a broad nanodevice community and to the electron microscopy industry includes open source software for analyzing data as well as the development of a novel equipment for advanced electron microscopy. The educational part provides innovative multidisciplinary learning opportunities for students at all levels, at the crossroads of electron microscopy and solid-state materials science in the Greater Philadelphia Area. To exploit the specific nature of this research project at the interface of physics and materials science, the PI's team participates in large public events in this metro area: the Nano Day at Penn, the Philadelphia Science Festival and the Philly Materials Day. The research team gives nanoscience presentations to high school students at the Penn Summer Science Academy and participates in the STEM outreach in the Philadelphia School District.Technical Abstract:This project exploits materials growth and materials irradiation by electron and ion beams to modify materials with nm-scale spatial and density control, towards engineering of their properties and observations of emerging phenomena that arise when material and device sizes are reduced and when single atomic layers of materials are stacked in a well-defined manner. This work establishes a more complete understanding of transport in low-dimensional materials that can enhance or replace silicon in future electronic-based devices. Thin atomic sheets are of particular interest since their electrical properties can be tuned by their geometry. Utilizing a novel experimental platform pioneered by the PI and state-of-the-art transmission electron microscopy instrumentation along with ex situ Raman spectroscopy, photoluminescence, and low temperature measurements, this project aims at understanding and controlling properties of thin materials such as nanosculpted structures for new multi-terminal electronic devices and few-nm-wide metal dichalcogenide nanoribbons. This research includes a comprehensive analysis toolkit enabling sub-angstrom device fabrication and atomically resolved property analysis. This work also advances device fabrication and characterization, thus opening the door to a wealth of unexplored physics. This research is organized into three primary cross-cutting themes: (1) growth, stacking, and electron microscopy characterization of two-dimensional layers and heterostructures, (2) electron beam nanosculpting and processing into one-dimensional nanodevices, and (3) nanodevice measurements. This project focuses on new materials including graphene, transition metal dichalcogenides (MoS2 and WS2) and topological thermoelectrics (Bi2Se3).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.

非技术摘要：该NSF项目的重点是对新型二维纳米结构材料的实验研究，用于制造和合成一维电子设备。这项研究结合了在原子量表中用超薄材料和电特性的设备的制造。研究小组旨在推进对二维材料的综合，表征和理解，以逐拟原子控制结构 - 特性 - 绩效关系，同时监测设备加热和电子辐照过程中的演变，并记录关键设备（例如电子传输）。更广泛地说，该项目对教育（大学和K-12学生，公共论坛：节日和博物馆展览）和行业（例如电子显微镜公司）有影响。更广泛的影响还包括实现低维材料以及设备的进步，包括具有改善功耗的微型电子设备。此外，该项目影响开发芯片纳米级设备的行业。向广泛的纳米覆盖群社区和电子显微镜行业推出包括用于分析数据的开源软件以及开发用于高级电子显微镜的新型设备。该教育部分在大费城地区的电子显微镜和固态材料科学的十字架上为学生提供创新的多学科学习机会。为了利用该研究项目的特定性质，在物理与材料科学的界面上，PI的团队参加了该大都市地区的大型公共活动：宾夕法尼亚州的纳米日，费城科学节和费城材料日。 The research team gives nanoscience presentations to high school students at the Penn Summer Science Academy and participates in the STEM outreach in the Philadelphia School District.Technical Abstract:This project exploits materials growth and materials irradiation by electron and ion beams to modify materials with nm-scale spatial and density control, towards engineering of their properties and observations of emerging phenomena that arise when material and device sizes are reduced and when single原子层以明确的方式堆叠。 这项工作使人们对低维材料的运输有了更全面的了解，这些材料可以增强或替代将来的基于电子的设备中的硅。薄原子片特别感兴趣，因为它们的电性能可以通过其几何形状来调节。 Utilizing a novel experimental platform pioneered by the PI and state-of-the-art transmission electron microscopy instrumentation along with ex situ Raman spectroscopy, photoluminescence, and low temperature measurements, this project aims at understanding and controlling properties of thin materials such as nanosculpted structures for new multi-terminal electronic devices and few-nm-wide metal dichalcogenide nanoribbons.这项研究包括一项全面的分析工具包，可实现子 - Angstrom设备制造和原子化的性质分析。这项工作还推动了装置的制造和表征，从而为大量未开发的物理学打开了大门。这项研究被组织为三个主要的横切主题：（1）二维层和异质结构的生长，堆叠和电子显微镜表征，（2）电子束纳米纳米含量和加工成一维纳米电视，以及（3）Nananodevice测量。该项目侧重于新材料，包括石墨烯，过渡金属二核苷（MOS2和WS2）和拓扑热电学（BI2SE3）。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。

项目成果

Controlled doping of graphene by impurity charge compensation via a polarized ferroelectric polymer

• DOI: 10.1063/5.0003099
• 发表时间: 2020-03
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Kelotchi S. Figueroa;N. Pinto;Srinivas V. Mandyam;Meng-qiang Zhao;C. Wen;Paul Masih Das;Zhaoli Gao;M. Drndić;A. T. Charlie Johnson

Atomic-scale patterning in two-dimensional van der Waals superlattices

• DOI: 10.1088/1361-6528/ab596c
• 发表时间: 2020-03-06
• 期刊: NANOTECHNOLOGY
• 影响因子: 3.5
• 作者: Das, Paul Masih;Thiruraman, Jothi Priyanka;Drndic, Marija
• 通讯作者: Drndic, Marija

Gas flow through atomic-scale apertures

• DOI: 10.1126/sciadv.abc7927
• 发表时间: 2020-12-01
• 期刊: SCIENCE ADVANCES
• 影响因子: 13.6
• 作者: Thiruraman, Jothi Priyanka;Dar, Sidra Abbas;Radha, Boya
• 通讯作者: Radha, Boya

Computer vision AC-STEM automated image analysis for 2D nanopore applications

适用于 2D 纳米孔应用的计算机视觉 AC-STEM 自动图像分析

• DOI: 10.1016/j.ultramic.2021.113249
• 发表时间: 2021
• 期刊: Ultramicroscopy
• 影响因子: 2.2
• 作者: Chen, Joshua;Balan, Adrian;Masih Das, Paul;Thiruraman, Jothi Priyanka;Drndić, Marija
• 通讯作者: Drndić, Marija