CAREER: Probing Chemistry of Surface-Supported Nanostructures at the Angstrom-Scale

职业：埃级表面支撑纳米结构的化学探索

• 批准号: 1944796
• 负责人: Nan Jiang
• 金额: $ 68.61万
• 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: 2020
• 资助国家: 美国
• 起止时间: 2020-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1944796&HistoricalAwards=false
• 关键词: CAREER; Probing; Chemistry; Surface; Supported

Scanning tunneling microscopy (STM) technology was invented nearly 40 years ago. STM produced the first images of single atoms on a surface. Around the same time, it was discovered that light signals emitted from a vibrating molecule could be amplified more than a million times if the molecule was on the tip of a nanometer-scale metal tip. In this project funded by the Chemical Structure Dynamics and Mechanisms (CSDM-A) program of the Chemistry Division, Professor Nan Jiang of the Department of Chemistry at the University of Illinois at Chicago is developing a state-of-the-art technique that combines scanning tunneling microscopy (STM) with tip-enhanced Raman spectroscopy (TERS) to study bond stretching in an individual molecule with angstrom-scale spatial resolution (an angstrom is one hundred millionths of a centimeter). Using his TERS technique, Professor Jiang and his students study how individual molecules align relative to each other on surfaces. The Jiang research group seeks to uncover the details of how single molecules interact with surfaces. This research may ultimately provide fundamental knowledge that will able the control of surface-supported molecular structures and reactions. As part of this CAREER project, Professor Jiang and his group are bringing the excitement of chemistry research opportunities to community college and local high school students by offering them hands-on research experience in physical chemistry at the single molecule level. Dr. Jiang improves the participation of undergraduate students in experimental chemistry research by establishing a One-Week Physical Chemistry Workshop at UIC. In this workshop, Chicago City Colleges students from diverse backgrounds are exposed to scientific career paths. Dr. Jiang's group provides handheld Raman equipment to community college students in the Chicago area with online training materials and data analysis procedures. This sharing of equipment and data enriches the general chemistry laboratory experience.This project focuses on interrogating the mechanisms of forming and breaking chemical bonds at the angstrom-scale in various chemical environments using novel approaches. The combination of STM imaging with the detailed chemical information provided by Raman spectroscopy allows the interactions between organic adsorbates and specific binding sites on solid surfaces to be probed with spatial and spectroscopic resolution. Furthermore, Raman one-dimensional (1D) line profiles and two-dimensional (2D) mapping achieved with angstrom-scale spatial resolution provide the location of these vibrational modes on the surface, and hence, define the interactions between these molecules and specific binding sites. Detailed mechanistic studies of the elementary steps of surface-supported structure formation are expected to lead to improvements in designing new atom- and energy-efficient materials and molecular assemblies with tailored chemical properties. The students engaged in this research and education project gain valuable experience in both scanning microscopy and optical spectroscopy, as well as quantum mechanics theory calculations which aid in the interpretation of experimental data.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.

扫描隧道显微镜（STM）技术是在大约40年前发明的。 STM在表面上产生了单个原子的第一个图像。大约在同一时间，发现如果分子位于纳米尺度金属尖端的尖端，则从振动分子发出的光信号可能会被放大超过一百万倍。 在化学部的化学结构动力学和机制（CSDM-A）计划的资助中用尖端增强的拉曼光谱（TER）扫描隧道显微镜（STM）研究以埃轴尺度空间分辨率在单个分子中拉伸的键拉伸（埃斯特罗姆是三分之一百万厘米的三分之一）。江教授和他的学生利用他的TERS技术研究了单个分子如何相对于表面上的相对对准。江恩研究小组旨在揭示单个分子如何与表面相互作用的细节。 这项研究最终可能提供基本知识，以控制表面支持的分子结构和反应。作为该职业项目的一部分，江教授及其小组通过为他们在单分子一级提供动手实践研究经验，将化学研究机会的兴奋带给社区学院和当地的高中生。 Jiang博士通过在UIC建立一个为期一周的物理化学研讨会来改善本科生参与实验化学研究。在这个研讨会上，来自不同背景的芝加哥城市学院学生接触了科学职业道路。 Jiang博士小组通过在线培训材料和数据分析程序为芝加哥地区的社区大学生提供手持式拉曼设备。这种设备和数据的共享丰富了通用化学实验室的经验。该项目着重于使用新方法在各种化学环境中审问在Angstrom尺度上形成和破坏化学键的机制。 STM成像与拉曼光谱法提供的详细化学信息的组合允许有机吸附物与固体表面上的特定结合位点之间的相互作用，并通过空间和光谱分辨率进行探测。此外，拉曼一维线（1D）线轮廓和用Angstrom尺度空间分辨率实现的二维（2D）映射提供了这些振动模式在表面上的位置，因此，定义了这些分子与特定结合位点之间的相互作用。预计表面支撑结构形成的基本步骤的详细机械研究将导致设计新的原子和节能材料和具有定制化学特性的分子组件。从事这项研究和教育项目的学生在扫描显微镜和光学光谱方面都能获得宝贵的经验，以及量子力学理论计算，有助于解释实验数据。该奖项反映了NSF的法定任务，并被认为是值得通过的支持。使用基金会的智力优点和更广泛的影响评估标准进行评估。

项目成果

Characterizations of two-dimensional materials with cryogenic ultrahigh vacuum near-field optical microscopy in the visible range

• DOI: 10.1116/6.0001853
• 发表时间: 2022-07-01
• 期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
• 影响因子: 2.9
• 作者: Schultz，Jeremy F.;Jiang，Nan
• 通讯作者: Jiang，Nan

Reconfigurable perovskite nickelate electronics for artificial intelligence

用于人工智能的可重构钙钛矿镍酸盐电子器件

• DOI: 10.1126/science.abj7943
• 发表时间: 2022
• 期刊: Science
• 影响因子: 56.9
• 作者: Zhang, Hai-Tian;Park, Tae Joon;Islam, A. N.;Tran, Dat S.;Manna, Sukriti;Wang, Qi;Mondal, Sandip;Yu, Haoming;Banik, Suvo;Cheng, Shaobo
• 通讯作者: Cheng, Shaobo

Proximity and single-molecule energetics

• DOI: 10.1126/science.abj5860
• 发表时间: 2021-07
• 期刊: Science
• 影响因子: 56.9
• 作者: Linfei Li;Nan Jiang

Localized surface plasmon controlled chemistry at and beyond the nanoscale

• DOI: 10.1063/5.0143947
• 发表时间: 2023-06
• 期刊: Chemical Physics Reviews
• 作者: Sayantan Mahapatra;Dairong Liu;Chamath Siribaddana;Kai Wang;Linfei Li;Nan Jiang

Chemical Characterization of a Three-Dimensional Double-Decker Molecule on a Surface via Scanning-Tunneling-Microscopy-Based Tip-Enhanced Raman Spectroscopy

通过基于扫描隧道显微镜的尖端增强拉曼光谱对表面上的三维双层分子进行化学表征

• DOI: 10.1021/acs.jpcc.2c01434
• 发表时间: 2022
• 期刊: The Journal of Physical Chemistry C
• 作者: Mahapatra, Sayantan;Schultz, Jeremy F.;Li, Linfei;Zhang, Xu;Jiang, Nan
• 通讯作者: Jiang, Nan