Redox Magnetoconvection of Solution in Small-Scale Electrochemical Systems

阿肯色大学的Ingrid Fritsch教授和密苏里大学的Nicholas Leventis教授和Kakattukuzhy M.Isaac教授因其对小规模电化学系统中溶液的氧化还原磁对流的研究而得到分析和表面化学计划的支持。这项研究将通过实验和建模，极大地扩大对氧化还原磁对流流体(搅拌/混合和定向流动)基础科学的理解，因为它属于小规模的液基系统。将考虑洛伦兹力、浓度梯度力和磁场梯度力的相对影响。在研究中将使用各种微电极几何形状、尺寸、配置和阵列，以确定化学物种的空间分布、法拉第和非法拉第电流和磁场矢量的大小以及载流物种的性质如何影响流动动力学、速度和分布。数学建模和数值模拟将被用来帮助理解影响流动的许多因素和在实验上无法分离的去卷曲因素。小型流体推进或微流体在基于芯片的设备中是必不可少的，以泵和混合液体，导致自动化化学分析在蛋白质组学、基因组学、环境、医疗和临床领域得到应用。拟议研究的结果将有助于确定氧化还原磁对流参与这一应用的作用和程度。

Professors Ingrid Fritsch of the University of Arkansas and Nicholas Leventis and Kakkattukuzhy M. Isaac of the University of Missouri, Rolla, are supported by the Analytical and Surface Chemistry Program for their research on redox magnetoconvection of solution in small-scale electrochemical systems. The research will greatly expand the understanding of the fundamental science of redox magnetoconvective fluidics (stirring/mixing and directed flow) as it pertains to small-scale, liquid-based systems, through experiment and modeling. The relative impact of the Lorentz, concentration-gradient, and magnetic-field gradient forces will be considered. A variety of microelectrode geometries, dimensions, configurations, and arrays will be used in studies to determine how spatial distribution of chemical species, magnitude of faradaic and non-faradaic current and magnetic field vectors, as well as the nature of the current carrying species, contribute to flow dynamics, velocities, and profiles. Mathematical modeling and numerical simulations will be used to aid in understanding the many factors that contribute to the flow and to deconvolute factors that are experimentally impossible to separate.Small-scale fluid propulsion, or microfluidics, is essential in chip-based devices to pump and mix liquids, leading to automated chemical analysis having applications in proteomics, genomics, environmental, medical and clinical areas. The findings of the proposed studies will help to determine the role and extent that redox magnetoconvection could participate in this application.