Probing Local Structural and Chemical Properties of Atomically Thin Two-Dimensional Materials by Optical Scanning Tunneling Microscopy

通过光学扫描隧道显微镜探测原子薄二维材料的局部结构和化学性质

基本信息

批准号：
2211474
负责人：
Nan Jiang
金额：
$ 53.75万
依托单位：
University of Illinois at Chicago
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：
2022-07-15 至 2025-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2211474&HistoricalAwards=false
关键词：
Probing Local Structural Chemical Properties

项目摘要

NON-TECHNICAL SUMMARYThe development of new technological applications requires new materials with appropriate properties. Two-dimensional (2D) materials attract tremendous interest because they have a broad range of material properties for creating complex artificial structures with novel functionalities unavailable in natural bulk materials. By harnessing their unique properties, 2D materials can be used for many applications, such as flexible electronics, miniaturized devices, and providing electricity for wearable electronics. In this project, funded by the Solid State and Materials Chemistry Program of the Division of Materials Research, Prof. Nan Jiang and his research group at the University of Illinois, Chicago, will focus on the synthesis of boron monolayer (borophene) related 2D materials, which have unique structural and physical properties. The project encompasses the development of complex borophene-based structures and the measurement of their local properties with an unprecedented spatial resolution. Such advanced understanding is essential for fine-tuning the properties of 2D structures for electronics, photonics, sensing, and energy-harvesting applications. This project will recruit and train undergraduate and graduate students from underrepresented groups and will be integrated into a broad set of outreach efforts, including programs and demonstrations in elementary schools. TECHNICAL SUMMARYThis project, supported by the Solid State and Materials Chemistry Program of the Division of Materials Research, develops a new approach to precisely control and fundamentally understand the interplay among lattice, defects, and the electronic structure of novel 2D materials, such as borophene. The studies involve the direct observation of vibrational modes of borophene-based structures using a state-of-the-art technique that combines scanning tunneling microscopy (STM) with tip-enhanced Raman spectroscopy (TERS). This method facilitates the imaging and characterization of local vibrational and electron-phonon coupling properties of nano- and atomic-scale heterogeneity with approximately 5-Angstrom spatial resolution and 5-wavenumber spectroscopic resolution. In addition to detecting topographical and electronic properties, the STM-TERS approach elucidates localized interfacial features, including strain, defects, and doping at the atomic-thickness limit. Building on these groundbreaking technological advances, the project investigates the chemical modification of borophene via oxygen, defines the hybridization of borophene with organic molecules, and constructs borophene-related 2D van der Waals heterostructures. Collectively, these studies provide unprecedented insights into the relationship between charge and lattice at the atomic-thickness limit.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.

非技术摘要新技术应用的发展需要具有适当性能的新材料。二维 (2D) 材料引起了极大的兴趣，因为它们具有广泛的材料特性，可用于创建复杂的人造结构，并具有天然散装材料所不具备的新颖功能。通过利用其独特的特性，二维材料可用于许多应用，例如柔性电子产品、微型设备以及为可穿戴电子产品供电。在该项目中，由材料研究部固态与材料化学项目资助，伊利诺伊大学芝加哥分校南江教授及其研究小组将重点研究硼单层（硼烯）相关二维材料的合成，具有独特的结构和物理特性。该项目包括复杂的硼烯结构的开发以及以前所未有的空间分辨率测量其局部特性。这种先进的理解对于微调电子、光子、传感和能量收集应用的二维结构的特性至关重要。该项目将招募和培训来自代表性不足群体的本科生和研究生，并将纳入广泛的外展工作，包括小学的项目和示范。技术摘要该项目得到了材料研究部固态和材料化学项目的支持，开发了一种新方法来精确控制和从根本上理解新型二维材料（如硼烯）的晶格、缺陷和电子结构之间的相互作用。这些研究涉及使用最先进的技术直接观察基于硼烯的结构的振动模式，该技术将扫描隧道显微镜（STM）与尖端增强拉曼光谱（TERS）相结合。该方法有助于以大约 5 埃空间分辨率和 5 波数光谱分辨率对纳米和原子级异质性的局部振动和电子声子耦合特性进行成像和表征。除了检测形貌和电子特性之外，STM-TERS 方法还可以阐明局部界面特征，包括原子厚度极限下的应变、缺陷和掺杂。在这些突破性技术进步的基础上，该项目研究了通过氧对硼烯进行化学修饰，定义了硼烯与有机分子的杂化，并构建了与硼烯相关的二维范德华异质结构。总的来说，这些研究为原子厚度极限下电荷与晶格之间的关系提供了前所未有的见解。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Nanoscale Chemical Probing of Metal-Supported Ultrathin Ferrous Oxide via Tip-Enhanced Raman Spectroscopy and Scanning Tunneling Microscopy

通过尖端增强拉曼光谱和扫描隧道显微镜对金属支撑的超薄氧化亚铁进行纳米级化学探测

DOI：
10.1021/cbmi.4c00015
发表时间：
2024-03-21
期刊：
Chemical & Biomedical Imaging
影响因子：
0
作者：
Dairong Liu;Linfei Li;Nan Jiang
通讯作者：
Nan Jiang

Atomic‐Scale Insights into the Interlayer Characteristics and Oxygen Reactivity of Bilayer Borophene

原子尺度洞察双层硼烯的层间特性和氧反应性

DOI：
10.1002/anie.202306590
发表时间：
2023-06
期刊：
Angewandte Chemie International Edition
影响因子：
0
作者：
Li, Linfei;Schultz, Jeremy F.;Mahapatra, Sayantan;Liu, Xiaolong;Zhang, Xu;Hersam, Mark C.;Jiang, Nan
通讯作者：
Jiang, Nan

The selective blocking of potentially catalytically active sites on surface-supported iron oxide catalysts

表面负载氧化铁催化剂上潜在催化活性位点的选择性封闭