Electric-Field Assembly of Particles via Anisotropic Interactions

通过各向异性相互作用进行粒子的电场组装

• 批准号: 1336893
• 负责人: Ning Wu
• 金额: $ 37.17万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1336893&HistoricalAwards=false
• 关键词: Electric; Field; Assembly; Particles; via

1336893PI: WuThis project aims at creating, tuning, and exploiting a variety of anisotropic interactions in colloidal particles by a combination that consists of varying geometric, compositional, and interfacial properties of the particles and an application of an external electric field. The objective is to use a complementary experimental and theoretical approach to elucidate the fundamental links between various types of microscopically anisotropic interactions and the resulting mesoscopically assembled phases. This fundamental understanding will also be used to develop a scalable process that integrates both electric and convective flow fields to build macroscopic functional coatings that exhibit novel optical properties.In-situ manipulation of the anisotropic interactions and dynamic pathways will typically lead to micro- and nano-structures with reduced symmetry and enhanced directionality. These structures can interact with a broad range of electromagnetic waves in unique ways and exhibit collective plasmonic, photonic, optoelectronic, and magneto-optical properties that are not manifested at the level of single particles. As a result, the scalable coating technique developed in this project could lead to economical fabrication of next-generation functional materials that have great potential in energy-related applications, such as high-efficiency solar cells, photonic crystals, and energy-saving displays. The research will be fully integrated with education and outreach efforts that consist of training public school teachers in the Denver area, developing the learning modules related to colloids, and participating in summer research program for high school students.

1336893PI：吴该项目旨在通过颗粒的不同几何、成分和界面特性以及外部电场的应用组成的组合来创建、调整和利用胶体颗粒中的各种各向异性相互作用。目的是使用互补的实验和理论方法来阐明各种类型的微观各向异性相互作用与由此产生的介观组装相之间的基本联系。这一基本理解还将用于开发一种可扩展的工艺，该工艺集成了电流场和对流流场，以构建具有新颖光学特性的宏观功能涂层。各向异性相互作用和动态路径的原位操纵通常会导致微米和纳米-对称性降低、方向性增强的结构。这些结构可以以独特的方式与广泛的电磁波相互作用，并表现出单粒子水平上未表现出的集体等离子体、光子、光电和磁光特性。因此，该项目开发的可扩展涂层技术可以经济地制造下一代功能材料，这些材料在能源相关应用中具有巨大潜力，例如高效太阳能电池、光子晶体和节能显示器。该研究将与教育和推广工作充分结合，包括培训丹佛地区的公立学校教师、开发与胶体相关的学习模块以及参加高中生暑期研究项目。