RUI: Studies of Strongly Interacting Self-Assembled Systems

菲施本研究的重点是强相互作用的自组装系统的实验研究。 静态和动态光散射技术将用于在大气压和高压下研究半稀释和浓缩的散装表面活性剂溶液的物理性质。我们打算研究各种各样的系统，包括两性离子表面活性剂溶液，混合表面活性剂溶液和含有棒状或管状胶束的溶液。管状聚集体在表面或各向同性流体的二维相行为将通过光学和直接物理测量进行研究。由振动台上的小颗粒组成的模型系统的研究将补充这些测量。总的来说，该计划将提供必要的热力学信息和改进的微观理解散装半稀释液和浓缩胶束溶液和新的见解和模型系统，以了解在两个维度的相变。 本研究的目的是：1）通过光学和物理化学技术更好地了解半稀态和浓态自组装体系的性质; 2）研究这些溶液在自组装聚集体形成三维溶液时的性质以及当它们被限制在各向同性流体表面时，从而形成二维自组装相。总的来说，该计划将提供必要的热力学信息和改进的微观理解散装半稀释液和浓缩胶束溶液和新的见解和模型系统，以了解在两个维度的相变。

Fisch This research focusses on experimental investigations of strongly interacting self-assembled systems. Static and dynamic light scattering techniques will be used, at atmospheric pressure and at high pressures, to study the physical properties of semidilute and concentrated bulk surfactant solutions. We intend to investigate a wide variety of systems including zwitterionic surfactant solutions, mixed surfactant solutions and solutions that contain either rod-like or tubular micelles. The two dimensional phase behavior of tubular aggregates on the surface or an isotropic fluid will be studied both optically and through direct physical measurements. Studies of model systems that consist of small particles on a vibrating table will complement these measurements. Overall, this program will provide essential thermodynamic information and an improved microscopic understanding of bulk semidilute and concentrated micellar solutions and new insights and model systems for understanding phase transitions in two dimensions. %%% The objectives of this research are: 1) to obtain a better understanding of the properties of semidilute and concentrated self-assembled systems by using optical and physical chemical techniques; 2) to study the properties of these solutions when the self-assembled aggregates form a 3-d solution and when they are confined to the surface of an isotropic fluid, thus forming a 2-d nematic phase. Overall, this program will provide essential thermodynamic information and an improved microscopic understanding of bulk semidilute and concentrated micellar solutions and new insights and model systems for understanding phase transitions in two dimensions.