SYNTHESIS, ASSEMBLY, AND ELECTROCHROMIC BEHAVIOR OF NANOSTRUCTURED CONJUGATED POLYMER/METAL INTERFACES

纳米结构共轭聚合物/金属界面的合成、组装和电致变色行为

• 批准号: 1506046
• 负责人: Vladimir Tsukruk
• 金额: $ 40万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-15 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506046&HistoricalAwards=false
• 关键词: SYNTHESIS; ASSEMBLY; ELECTROCHROMIC; BEHAVIOR; NANOSTRUCTURED

In this project, Professors Vladimir Tsukruk and John Reynolds of Georgia Institute of Technology are supported by the Macromolecular, Supramolecular, and Nanochemistry (MSN) Program of the NSF to make new materials consisting of polymers combined with gold and silver nanometer-sized particles. Currently, novel color-changing materials made of plastic or polymers can be designed so that their colors can be tuned from purple to red and their transparency from absolutely clear to completely opaque. Flexible filters made from these polymers can block or deflect harmful short wavelengths (like those that cause sunburn) and transmit long wavelengths useful for sun-illuminated heating. Most of the filters known today are fixed for a particular function and cannot be changed after fabrication. It is possible to change the color and transparency of these filters using light, the chemical environment, or small applied electric fields. The potential uses of these novel structures are to facilitate intelligent light harvesting for flexible solar cells at dusk or dawn and to create wearable electronics that allow the continuous monitoring of the wearer's health. Further, this work has an impact in regard to chemistry education and teaching through the development of select in-house tutorials defining the fundamental aspects of conjugated polymer synthesis and electrochemistry that are required in order for one to be conversant in these technologies. A broader impact of this project is the enhanced training of graduate and undergraduate students with an emphasis on their early involvement in interdisciplinary, fundamental research with active recruitment of underrepresented groups. To broaden the scope of these efforts, webinar tutorials are developed and made available through a website that uses WIKI software for release to the general scientific community. This work impacts energy sciences, polymer and materials chemistry, electrochemistry, and organic electronics.The merit of this cross-disciplinary study is the development of a fundamental understanding of the behavior and driving molecular mechanisms of electrochemically-driven transformations of macromolecules. These transformations affect the supramolecular organization, redox state, and the balance of electronic and ionic conductivities of macromolecules in proximity to inorganic interfaces. The various processes associated with electrochromic behavior are investigated utilizing a series of newly synthesized polymers deposited on metal interfaces. The work includes synthesis of novel water-soluble and processable conjugated polyelectrolytes with variations in band gap, color, and oxidation potential. The assembly of interfacial polymer layers around noble metal nanostructures balances local and global polymer chain conformation, charge, and redox potential distribution. These factors are critical for controlling the optical properties of the polymers including absorbance, refractive index, and plasmonic interactions during electrochemical oxidation. The broader impacts of this project include the involvement of students into cross-disciplinary, fundamental research and the dissemination of new skills and knowledge to the broader educational community through tutorial webinars.

在这个项目中，佐治亚理工学院的弗拉基米尔·库克鲁克（Vladimir Tsukruk）和约翰·雷诺兹（John Reynolds）得到了NSF的大分子，超分子和纳米化学（MSN）计划的支持，以制造由与金色和银色纳米尺寸颗粒结合的聚合物组成的新材料。当前，可以设计由塑料或聚合物制成的新型颜色变化材料，以便可以将其颜色从紫色到红色调整，并从绝对透明到完全不透明。由这些聚合物制成的柔性过滤器可以阻止或偏转有害的短波长（例如引起晒伤的波长），并传输长波长，可用于阳光照射的加热。当今已知的大多数过滤器都是针对特定功能固定的，在制造后不能更改。可以使用光，化学环境或小型施加的电场更改这些过滤器的颜色和透明度。这些新型结构的潜在用途是促进黄昏或黎明的柔性太阳能电池的智能光收集，并创建可穿戴电子设备，从而可以连续监测佩戴者的健康。此外，这项工作对化学教育和教学产生了影响，通过开发精选的内部教程，定义了为了使这些技术在这些技术中熟悉的辅助聚合物合成和电化学的基本方面。该项目的一个更广泛的影响是对研究生和本科生的培训增强，重点是他们早期参与跨学科的基础研究，并积极招募人数不足的群体。为了扩大这些努力的范围，通过使用Wiki软件将Wiki软件发布给通用科学界的网站开发并提供了网络研讨会教程。这项工作会影响能源科学，聚合物和材料化学，电化学和有机电子学。这项跨学科研究的优点是对巨型分子的电化学驱动转化的行为和驱动分子机制的基本了解的发展。 这些转变会影响超分子组织，氧化还原状态以及大分子与无机界面近端的电子和离子电导率的平衡。利用沉积在金属界面上的一系列新合成的聚合物，研究了与电色素行为相关的各种过程。这项工作包括合成新型水溶性和可加工的共轭聚电解质，具有带隙，颜色和氧化潜力的变化。界面聚合物层的组装围绕高贵金属纳米结构平衡了局部和全球聚合物链构象，电荷和氧化还原电位分布。 这些因素对于控制聚合物的光学特性至关重要，包括吸光度，折射率和等离子氧化过程中的等离子相互作用。该项目的更广泛影响包括学生参与跨学科，基础研究以及通过教程网络研讨会向更广泛的教育社区传播新技能和知识。