Understanding Redox Reaction Mechanism and Dynamics at Single Nanoparticles Using ECL and Scanning Nanoelectrode with Improved Spatial and Spectral Resolution

在这个由NSF化学部化学测量成像计划资助的项目中，亚拉巴马大学的Shanlin Pan教授正在开发电化学和光谱技术，以帮助解决传统电化学方法在纳米尺度上研究氧化还原事件的技术和科学挑战。光谱学、纳米电化学和成像技术的组合方法将用于解决这些挑战。更广泛的影响是通过推广工作来解决的，重点是将研究项目与高中教师的教育和培训以及教育模块的开发相结合。参与该项目的学生将成为跨学科团队的一部分，并将在光谱电化学和材料科学领域进行交叉培训。这些技能将在他们未来的职业生涯中发挥作用。拟议的教育活动将有助于加强亚拉巴马地区少数民族学生和教师的招聘和保留。该提案旨在解决科学和技术挑战，以了解详细的氧化还原反应机制和等离子体相互作用与电致化学发光（ECL）在单个金属纳米粒子（NP）使用改进的光谱电化学技术。该提案的任务1涉及使用ECL在单个金属NP上研究局部电化学反应及其时间和空间异质性。任务-2的目的是解决单个纳米粒子的局部电化学事件的形状依赖性与扫描纳米电极探针方法，具有超空间分辨率，超出光学衍射极限，和可靠的光谱分辨率探测局部界面电荷转移事件。

In this project funded by the Chemical Measurement & Imaging Program of the Chemistry Division of the NSF, Professor Shanlin Pan of The University of Alabama is developing electrochemistry and spectroscopy techniques to help address technical and scientific challenges of conventional electrochemistry methods for studying redox events at the nanometer scale. Combined methods of optical spectroscopy, nanoelectrochemistry, and imaging techniques will be used to address these challenges. The broader impacts are addressed in through outreach efforts focus on integrating the research project with education and training of high school teachers as well as education module development. The students working on this project will be part of an interdisciplinary team, and will be cross-trained in the areas of spectroelectrochemistry and material science. These skills will serve them well in their future careers. The proposed educational activities will help enhance the recruitment and retention of minority students and faculties in the Alabama area. The proposal is designed to address both scientific and technical challenges for understanding detailed redox reaction mechanism and plasmon interaction with electrogenerated chemiluminescence (ECL) at single metallic nanoparticles (NPs) using improved spectroelectrochemistry techniques. Task-1 of the proposal involves the study of local electrochemical reaction and its temporal and spatial heterogeneities using ECL at single metallic NPs. Task-2 is designed to resolve the shape dependence of single NPs local electrochemical events with a scanning nanoelectrode probe method that has super-spatial resolution, beyond the optical diffraction limit, and reliable spectral resolution for probing local interfacial charge transfer events.