Dynamics of Lateral Processes in Monolayers and Bilayers at Interfaces

这个项目是在一般地区的分析和表面 化学和界面结构的子领域， 动力学 本研究的目的是开发一种 了解横向电荷和质量输运的动力学 在单层和双层组件中的工艺。 借鉴 在NSF资助的任期内取得的开创性进展 CHE-8504368，Majda教授和他的学生将追求四个 相关的研究方向：首先，他们将探索 作为一个动力学的平移扩散在双层组装 单个成分的结构功能 两亲物;第二，它们将决定电子 在有序单层中横向发生的转移反应 第三，它们将表征 单分子膜中的两亲性卟啉分子作为一种可行的方法 涉及氧到水的电催化还原;和第四， 他们将探索有组织单层的适用性， 控制电极选择性的组件 反应. 这些研究重点利用了该小组的 最近开发的设计和控制结构的能力 的单分子组件，并探测这些行为， 新的电化学方法。 另外，荧光 光谱方法，朗缪尔-布洛杰特技术， 荧光显微镜和接触角测量将被 应用在这些实验中。 这项研究将有助于加深对 分子在有序单层和双层中的行为 例如生物膜系统。 此外，本发明还 这些研究应该会给设计带来新的见解， 高效和选择性的电催化系统。

This project is in the general area of analytical and surface chemistry and in the subfield of interfacial structure and dynamics. The goal of this research is to develop an understanding of the dynamics of lateral charge and mass transport processes in monolayer and bilayer assemblies. Drawing upon pioneering advances made during the tenure of NSF grant CHE-8504368, Professor Majda and his students will pursue four related research thrusts: In the first, they will explore the dynamics of translational diffusion in bilayer assemblies as a function of the structure of the individual constituent amphiphiles; second, they will determine the kinetics of electron transfer reactions taking place laterally in organized monolayer assemblies; third, they will characterize the reactivity of amphiphilic porphyrin molecules in monolayers as a viable approach to the electrocatalytic reduction of oxygen to water; and fourth, they will explore the applicability of organized monolayer assemblies to the control of the selectivity of electrode reactions. These research thrusts take advantage of this group's recently developed abilities to design and control the structure of monomolecular assemblies and to probe the behavior of these systems with novel electrochemical methods. Also, fluorescence spectroscopic methods, Langmuir-Blodgett techniques, epifluorescence microscopy, and contact angle measurements will be applied in these experimental efforts. This research will contribute to an enhanced understanding of the behavior of molecules in organized monolayer and bilayer assemblies such as biological membrane systems. Additionally, these studies should give rise to new insights into the design of efficient and selective electrocatalytic systems.