Instrument Development: Creating a Tunable, Broad bandwidth 2D IR Microscope for Quantitative Imaging of Chemical Dynamics Near Reactive Surfaces

仪器开发：创建可调谐、宽带 2D 红外显微镜，用于对反应表面附近的化学动力学进行定量成像

• 批准号: 2108346
• 负责人: Amber Krummel
• 金额: $ 51.02万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108346&HistoricalAwards=false
• 关键词: Instrument; Development; Creating; Tunable; Broad

With the support of the Chemical Measurement and Imaging (CMI) Program in the Division of Chemistry, Amber Krummel of Colorado State University will study the structures and motions of molecules near electrode surfaces. A major goal is to produce molecular snapshots during the formation and growth of the solid electrolyte interphase (SEI) in a model electrochemical cell. The electrolytes and electrodes used in this project will be chosen to closely model organic battery electrolytes and half-cells contributing to emerging energy storage technologies. Dr. Krummel and her group will be building new capabilities into an emerging imaging technique— 2-dimensional infrared (2D-IR) microscopy. 2D-IR microscopy holds the promise of visualizing the "molecular dance" taking place near electrode surfaces, due to its ability to provide chemical information at ultrafast time scales and its sensitivity to different types of molecular structures. The efforts supported by this funding will produce new chemical imaging tools crucial to many disciplines of science and technology, such as electrochemical processes associated with clean energy technologies, materials science, biotechnology, and geology. The results of the imaging experiments are expected to provide insights into the fundamental characteristics of SEI, which is key for understanding device performance issues encountered in energy storage technologies. Further broadening impacts of the project are Dr. Krummel is helping to train the next generation of spectroscopists and microscopists in the areas of physical chemistry, laser physics, and materials chemistry. The primary goal of building a tunable, broad bandwidth 2D-IR microscope will require integration of knowledge in optical physics, imaging, and ultrafast nonlinear optical spectroscopy tools. Finally, through hands-on mentoring, the researchers in the Krummel group will learn the art of communicating their innovations to broad audiences and principles of community through direct training in diversity, equity, inclusion, and social justice issues within their communities.Developing an imaging modality capable of reporting chemical dynamics at ultrashort timescales and then connecting the observed dynamics to macroscopic observables is extremely attractive. Two-dimensional infrared (2D-IR) spectroscopy is a proven tool for capturing information on chemical structures and dynamics at femtosecond timescales and longer, which limits its recording chemical information about reactions that are extremely fast and key to many crucial chemical processes. This project is expected to significantly reduce the acquisition time of 2D IR spectra, thus making it possible to develop new 2D-IR imaging tools to directly measure molecular interactions across multiple length scales. The scientific inquiry outlined in this project aims to create a new nonlinear optical microscopy tool capable of mapping chemical interactions. The chemical interactions that will be mapped are expected to contain quantitative details of dynamic behaviors in electrolytes near electrode surfaces. The research team will initiate in situ imaging of molecular structures and dynamics during solid electrolyte interphase formation for the first time. These experimentshave to potential to increase knowledge of fundamental driving forces present during SEI formation at electrode surfaces, providing crucial control parameters of the SEI, as well as demonstrating the utility of 2D-IR imaging across a range of scientific disciplines.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.

在化学系化学测量和成像(CMI)计划的支持下，科罗拉多州立大学的琥珀·克鲁梅尔将研究电极表面附近分子的结构和运动。一个主要的目标是在模型电化学电池中固体电解质界面(SEI)的形成和生长过程中产生分子快照。本项目中使用的电解液和电极将被选为对新兴储能技术做出贡献的有机电池电解液和半电池的紧密模型。克鲁梅尔博士和她的团队将在一种新兴的成像技术--二维红外(2D-IR)显微镜中建立新的能力。由于2D-IR显微镜能够在超快的时间尺度上提供化学信息以及它对不同类型的分子结构的敏感性，2D-IR显微镜有望可视化发生在电极表面附近的“分子舞蹈”。这笔资金支持的努力将产生对许多科学和技术学科至关重要的新的化学成像工具，例如与清洁能源技术、材料科学、生物技术和地质学相关的电化学过程。成像实验的结果有望深入了解SEI的基本特征，这是理解储能技术中遇到的设备性能问题的关键。该项目的影响进一步扩大，克鲁梅尔博士正在帮助培训物理化学、激光物理和材料化学领域的下一代光谱学家和显微镜学家。建造可调谐、宽带2D-IR显微镜的主要目标将需要集成光学物理、成像和超快非线性光学光谱分析工具方面的知识。最后，通过实践指导，克鲁梅尔小组的研究人员将学习通过直接培训社区内的多样性、公平、包容性和社会正义问题，向广泛的受众传达他们的创新和社区原则的艺术。开发一种能够在超短时间尺度上报告化学动力学并将观察到的动力学与宏观可观察物联系起来的成像模式非常有吸引力。二维红外光谱(2D-IR)是一种在飞秒或更长的时间尺度上捕捉化学结构和动力学信息的成熟工具，这限制了它记录关于极快的反应的化学信息，这些反应是许多关键化学过程的关键。该项目预计将大大减少2D红外光谱的获取时间，从而使开发新的2D-IR成像工具直接测量多个长度尺度上的分子相互作用成为可能。该项目中概述的科学研究旨在创造一种新的能够绘制化学相互作用图的非线性光学显微镜工具。将绘制的化学相互作用图预计将包含电极表面附近电解液中动态行为的定量细节。该研究小组将首次对固体电解质界面形成过程中的分子结构和动力学进行原位成像。这些实验有可能增加电极表面SEI形成过程中存在的基本驱动力的知识，提供SEI的关键控制参数，并展示2D-IR成像在一系列科学学科中的实用性。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。