Structural Origins of Electron Transfer Rates Across Self-Assembled Monolayers

9412720 Chidsey这个研究项目解决了长距离电子跨界面转移速率的结构起源。 它由分析和表面化学计划支持，目的是了解金属电极和精确定位的电活性物质之间的电子转移中介入和周围材料的作用。 连续介质模型将被检查作为理解和预测电子转移的活化势垒的基础，位于金属和极性电解质之间的电活性物质的作用将被检查，并且间隔材料的电子状态对电子转移的影响将在这些研究中被探测。 金电极上的硫醇单分子膜形成了这些电子转移研究的基础。 这些测量将对新的传感器和显示技术的发展产生影响，并将有助于了解从生物学到微电子学等应用中的界面电荷转移。 为了理解电极和电活性物质之间的电荷转移的速率和机制，已经开发了许多模型方法。 一种非常有前途的方法使用自组装单层技术来定位电活性物质并控制电子转移发生的介质的结构和电子性质。 这里支持的工作使用这种方法来检查跨接口的电荷转移速率的结构起源。 这一领域的知识对于理解生物膜电荷转移机制以及开发新的传感和显示技术至关重要。 这里支持的工作将有助于发展这种理解。

9412720 Chidsey This research project addresses the structural origins of the rates of long distance electron transfer across interfaces. It is supported by the Analytical and Surface Chemistry program, with a goal of understanding the role of intervening and surrounding material in the transfer of electrons between a metal electrode and a precisely positioned electroactive species. The continuum dielectric model will be examined as a basis for understanding and predicting the activation barrier to electron transfer, the role of electroactive species located between the metal and the polar electrolyte will be examined, and the effect of electronic states of the spacer material on electron transfer will be probed in these studies. Thiol monolayers on gold electrodes form the basis for these electron transfer studies. These measurements will have impact on the development of new sensor and display technologies, and will help to develop an understanding of interfacial charge transfer in applications ranging from biology to microelectronics. %%% In order to understand the rates and mechanisms of charge transfer between electrodes and electroactive species, a number of model approaches have been developed. One very promising approach uses self assembled monolayer technology to position the electroactive species and to control the structure and electronic properties of the medium through which electron transfer occurs. The work supported here uses this approach to examine the structural origins of the rates of charge transfer across interfaces. Knowledge in this area is crucial to understanding the mechanisms of biological membrane charge transfer, and in the development of new sensing and display technologies. The work supported here will contribute to the development of this understanding.