Translocation and diffusion of polyelectrolytes and electronic conduction in polyelectrolyte systems

非技术性：当一定数量的带电离子分散在盐溶液中，以链状方式连接在一起时，该系统会表现出诱人的特性，并对反应的化学性质进行额外的调整。使用这些材料的实例包括尿布中水的超吸收性、使用合成平台靶向递送大的大分子如基因、通过纳米流体装置引导运输带电大分子、以及由水基溶液配制的高电导率的可吸收膜。尽管带电聚合物在当今的材料世界中非常重要，但基本的理解是有限的。困难来自同时作用于分子的几个长程力，使得每个分子感觉到系统中几乎所有其他分子的存在。主要研究者建议将精心选择的模型系统，计算机建模和先进的理论方法相结合的实验，以解决几个相互关联的传输特性的可再生能源系统。该项目在对具有广泛技术相关性和用途的先进材料的基本科学理解方面产生了社会影响。 该研究的主要内容之一是培养该领域的下一代科学领导者，以满足日益增长的全球挑战和社会需求。技术：通过结合单分子电泳，光散射，流变学，统计力学，场论和多种模拟技术，提出了实验和开发新的理论，用于单分子动力学，双分子凝胶动力学和双分子系统中的电传导。 将研究几种非线性输运现象。具体而言，该项目涉及（a）合成支化聚电解质的易位，（B）凝胶动力学和聚电解质在凝胶中的扩散，以及（c）凝胶系统中的电子传导。本项目的目的是建立一种新的分离技术，用于不同结构的聚电解质，并发现新的概念模型，用于电子传递和电子传递在电子传递系统。这项研究的结果将在许多应用领域产生影响，如超吸水性商品，分离科学，分离技术的分子筛，药物输送平台，有机光伏器件，有机发光二极管，射频识别标签和抗静电涂料。在这一研究领域培训研究生是拟议活动的主要教育组成部分。

NON-TECHNICAL:When certain numbers of charged ions, dispersed in a salty solution, are connected together in a chain-like fashion, the system exhibits tantalizing properties with additional tuning of chemistry of reactions. Examples of use of these materials include super-absorbancy of water in diapers, targeted delivery of large macromolecules such as genes using synthetic platforms, guided transport of charged macromolecules through nano-fluidic devices, and high electronic conductivity of polyelectrolyte films formulated from water-based solutions. Despite the high importance of charged polymers in today's materials world, fundamental understanding is limited. The difficulty arises from several long-range forces acting on the molecules simultaneously so that each molecule feels the presence of almost every other molecule in the system. The Principal Investigator proposes to bring a combination of experiments on carefully chosen model systems, computer modeling, and advanced theoretical methods to address several interrelated transport properties of polyelectrolyte systems. The project offers societal impact in terms of fundamental scientific understanding of advanced materials of broad technological relevance and use. One of the major components of the proposed research is to train the next generation of scientific leaders in this area so as to meet the growing global challenges and societal needs.TECHNICAL:Experiments and development of new theories are proposed for polyelectrolyte dynamics, polyelectrolyte gel dynamics, and electrical conduction in polyelectrolyte systems, by combining single molecule electrophoresis, light scattering, rheology, statistical mechanics, field theory, and several simulation techniques. Several polyelectrolyte transport phenomena will be studied. Specifically, the project addresses (a) translocation of synthetic branched polyelectrolytes, (b) polyelectrolyte gel dynamics and diffusion of polyelectrolytes in polyelectrolyte gels, and (c) electronic conduction in polyelectrolyte systems. This project is aimed at building a new separation technique for polyelectrolytes with different architectures, and discovering new conceptual models for polyelectrolyte transport and electron transport in polyelectrolyte systems. The results of this research will have impact in numerous applied areas such as super-water absorbent goods, separation science, molecular sieves for separation techniques, drug delivery platforms, organic photovoltaic devices, organic light-emitting diodes, radio frequency identification tags, and antistatic coatings. Training of graduate students in this research area is the primary educational component of the proposed activity.