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）项目的支持下，科罗拉多州立大学的Amber Krummel将研究电极表面附近分子的结构和运动。 一个主要目标是在模型电化学电池中固体电解质界面（SEI）的形成和生长期间产生分子快照。 该项目中使用的电解质和电极将被选择为有机电池电解质和半电池的紧密模型，有助于新兴的储能技术。 Krummel博士和她的团队将为新兴的成像技术-二维红外（2D-IR）显微镜建立新的能力。 2D-IR显微镜有望可视化电极表面附近发生的“分子舞蹈”，因为它能够在超快时间尺度上提供化学信息，并且对不同类型的分子结构敏感。 这笔资金支持的工作将产生对许多科学和技术学科至关重要的新化学成像工具，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提供对SEI基本特征的深入了解，这是理解储能技术中遇到的器件性能问题的关键。 该项目的进一步扩大影响是Krummel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。 建立一个可调谐的，宽带2D-IR显微镜的主要目标将需要在光学物理，成像和超快非线性光学光谱工具的知识集成。 最后，通过实践指导，Krummel小组的研究人员将学习如何通过直接培训将他们的创新传达给广大受众和社区原则，包括社区内的多样性，公平，包容和社会正义问题。开发一种能够在超短时间尺度上报告化学动力学的成像模式，然后将观察到的动态与宏观可观测数据联系起来，这是非常有吸引力的。 二维红外（2D-IR）光谱是一种经过验证的工具，用于在飞秒时间尺度和更长时间内捕获化学结构和动力学信息，这限制了其记录有关反应的化学信息，这些反应非常快，对许多关键化学过程至关重要。 该项目预计将大大减少二维红外光谱的采集时间，从而有可能开发新的二维红外成像工具，以直接测量跨多个长度尺度的分子相互作用。 该项目中概述的科学探究旨在创建一种能够映射化学相互作用的新的非线性光学显微镜工具。 预计将映射的化学相互作用包含电极表面附近的电解质中的动态行为的定量细节。 该研究小组将首次启动固体电解质界面形成过程中分子结构和动力学的原位成像。 这些实验有可能增加对电极表面SEI形成过程中存在的基本驱动力的了解，提供SEI的关键控制参数，以及展示二维红外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，并被认为值得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来支持。