US-Austria Cooperative Research: Impedance Studies of Sol-Gel Materials

这个奖项支持布鲁斯S。加州大学洛杉矶分校的邓恩， Manfred W教授的研究。研究所的Breiter 维也纳技术大学技术电化学。 他们研究的目的是更多地了解 凝胶在其溶解、凝胶化和 老化阶段 他们将应用阻抗谱来提供 有关凝胶形成和形态的信息， 更好地理解运输特性。 加州大学洛杉矶分校将 负责合成各种凝胶。 该协作 奥地利集团提供不同寻常的专业知识和专业设施 用于复阻抗的光谱测量， 建立分析模型。 这种布置提供了 独特的机会，应用宏观和微观分析 在相同的样本上。 溶胶-凝胶材料电性能的研究进展 在很大程度上仅限于对干燥和燃烧的 材料. 拟议的工作将探讨运输过程 在溶解和凝胶化的早期阶段。 是 在这些阶段中，介电性能受到 当移动的离子变得受阻和弛豫时 时代因结构僵化而改变。 更好地理解 凝胶的微观结构与传输特性之间的关系 结构将帮助他们开发出具有高 在其凝胶化阶段之前的阻抗。 结果将 补充邓恩博士目前NSF支持的研究， 发光光谱学监测局部化学和结构 变化 该研究旨在将有机 分子到溶胶-凝胶主机，以“工程师”的新性能。

This award supports Bruce S. Dunn of UCLA for collaborative research with Professor Manfred W. Breiter of the Institute of Technical Electrochemistry of the Technical University of Vienna. The objective of their research is to learn more about the dielectric properties of gels during their solution, gelation and aging stages. They will apply impedance spectroscopy to provide information about gel development and morphology and to gain a better understanding of transport properties. The UCLA group will be responsible for synthesizing various gels. The collaborating Austrian group offers unusual expertise and specialized facilities for the spectroscopic measurement of complex impedance and the development of analytical models. This arrangement provides a unique opportunity to apply macroscopic and microscopic analytical techniques on the same samples. Past studies of the electrical properties of sol-gel materials have been largely restricted to investigations of dried and fired materials. The proposed work will explore the transport processes of gels during the earlier stages of solution and gelation. It is during these stages that dielectric properties are subject to substantial change as mobile ions become impeded and relaxation times are altered by structural rigidity. A better understanding of the relationship between transport properties and gel micro- structure will help them to develop gels that possess high impedance prior to their gelation stage. The results will complement Dr. Dunn's current NSF-supported research which uses luminescent spectroscopy to monitor local chemical and structural changes. That research is aimed at the incorporation of organic molecules into sol-gel hosts, in order to "engineer" new properties.