Cultivating Conjugated Polymers as Novel Light Responsive Materials

培育共轭聚合物作为新型光响应材料

• 批准号: 1808946
• 负责人: Mark Dadmun
• 金额: $ 33万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808946&HistoricalAwards=false
• 关键词: Cultivating; Conjugated; Polymers; Novel; Light

NON-TECHNICAL SUMMARY:Stimuli-responsive materials alter their structure or properties according to changes in their environment. This research program will develop novel stimuli-responsive polymers whose function and properties can be controlled by light exposure. This is exciting as light is a "clean" stimulus in that it can be applied remotely without physical contact, is readily patternable, and its intensity can be tuned with great fidelity. Unfortunately, there are few compounds that are light-responsive. The planned research program will provide pathways to direct these structural changes to improve their performance in functional devices and to amplify these structural changes. The results of this research program will therefore expand the applications that can be rationally controlled and patterned by light exposure, which will significantly extend the practicality of light-responsive materials. Workforce development and training of the next generation of scientists and engineers who are prepared to tackle the grand challenges in stimuli-responsive materials will be realized through this research program and also by engaging public high school students in hands-on research experiences, thus providing exceptional preparation for college. Further impact will result from the completion of experiments at the national neutron facilities at ORNL and NIST where the students participating in this project will acquire hands-on experience in a multi-user facility and contribute to the continued health of these national resources. This project will also further develop the sustainable research infrastructure in Tennessee and will be implemented to promote the participation of underrepresented groups in research.TECHNICAL SUMMARY:The overarching goal of this research program is to provide pathways to rationally control the optoelectronic performance of conjugated polymers by altering their molecular, nanoscale, and mesoscale structure with exposure to light, as well as to provide robust routes to amplify their light-induced structural changes so as to realize novel light-responsive materials. Current results clearly show that the absorption of a photon by conjugated polymers reversibly alters their structure, assembly, and functionality. Therefore, this research program will elucidate the relationship between light-induced structural order in conjugated polymeric active layers and their photo-physical properties. In parallel, targeted conjugated polymer constructs that are designed to augment their alteration in structure and assembly when exposed to light in solutions and thin films will be developed and harnessed to provide routes to new stimuli-responsive materials with desired properties. This research program will develop methods to amplify the structural changes of conjugated polymers with exposure to light and correlate light-induced alteration of the hierarchical structure of conjugated-polymer mixtures to optimal functional response. This critical information will then be used to elucidate guidelines to enable the systematic modification, rational design and control of novel light-responsive materials with targeted properties. This research will also attempt to directly correlate the impact of photon absorption on conjugated polymer configuration, assembly, and vertical morphology to the optoelectronic performance of conjugated polymer active layers. This in turn may further provide crucial links toward the rational design of conjugated polymer solutions or blends and associated thermal, light, and deposition processing protocols so as to realize devices with optimal functional performance.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术总结：刺激反应材料根据环境的变化改变其结构或性质。该研究项目将开发新的刺激响应聚合物，其功能和特性可以通过光照控制。这是令人兴奋的，因为光是一种“干净”的刺激，它可以在没有物理接触的情况下远程应用，很容易形成模式，并且它的强度可以非常精确地调节。不幸的是，很少有化合物对光有反应。计划中的研究项目将提供指导这些结构变化的途径，以提高其在功能设备中的性能，并扩大这些结构变化。因此，该研究项目的结果将扩展可通过光照合理控制和模式化的应用，这将大大扩展光响应材料的实用性。劳动力的发展和下一代科学家和工程师的培训，他们准备应对刺激响应材料的巨大挑战，将通过该研究项目以及让公立高中学生参与实践研究经验来实现，从而为大学提供卓越的准备。在ORNL和NIST的国家中子设施完成实验后，将产生进一步的影响，参与该项目的学生将获得多用户设施的实践经验，并为这些国家资源的持续健康做出贡献。该项目还将进一步发展田纳西州的可持续研究基础设施，并将实施以促进代表性不足的群体参与研究。技术概述：本研究项目的总体目标是通过改变共轭聚合物的分子、纳米尺度和中观尺度结构，为合理控制其光电性能提供途径，并为放大其光致结构变化提供可靠的途径，从而实现新型光响应材料。目前的结果清楚地表明，光子的吸收共轭聚合物可逆地改变其结构，组装和功能。因此，本研究项目将阐明共轭聚合物活性层的光致结构顺序与其光物理性质之间的关系。与此同时，当暴露在溶液和薄膜中的光下时，旨在增强其结构和组装变化的靶向共轭聚合物结构将被开发和利用，为具有理想性能的新刺激响应材料提供途径。本研究计划将开发方法来放大暴露于光下共轭聚合物的结构变化，并将光诱导共轭聚合物混合物的层次结构改变与最佳功能响应联系起来。然后，这些关键信息将用于阐明指导方针，以实现系统修改，合理设计和控制具有目标特性的新型光响应材料。本研究还将尝试直接将光子吸收对共轭聚合物构型、组装和垂直形态的影响与共轭聚合物活性层的光电性能联系起来。这反过来可能进一步为合理设计共轭聚合物溶液或共混物以及相关的热、光和沉积处理方案提供关键环节，从而实现具有最佳功能性能的器件。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Controlling the Morphology of PEDOT:PSS Blend Films with Pre-Deposition Solution Composition and Deposition Technique

• DOI: 10.1021/acsapm.1c00748
• 发表时间: 2021-12-08
• 期刊: ACS APPLIED POLYMER MATERIALS
• 影响因子: 5
• 作者: Heroux, Luke;Moncada, Josh;Dadmun, Mark
• 通讯作者: Dadmun, Mark

Elucidating the Kinetic and Thermodynamic Driving Forces in Polymer Blend Film Self-Stratification

• DOI: 10.1021/acs.macromol.8b01397
• 发表时间: 2018-09
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Samantha J Rinehart;Guangcui Yuan;M. Dadmun

The interplay of thermodynamics and kinetics: imparting hierarchical control over film formation of self-stratified blends

热力学和动力学的相互作用：对自分层共混物的成膜进行分级控制

• DOI: 10.1039/c9sm01147a
• 发表时间: 2020
• 期刊: Soft Matter
• 影响因子: 3.4
• 作者: Rinehart, Samantha J.;Yuan, Guangcui;Dadmun, Mark D.
• 通讯作者: Dadmun, Mark D.

Incorporating crosslinks in fused filament fabrication: Molecular insight into post deposition reactions

在熔丝制造中加入交联：对沉积后反应的分子洞察

• DOI: 10.1016/j.addma.2020.101746
• 发表时间: 2021
• 期刊: Additive Manufacturing
• 影响因子: 11
• 作者: Perryman, S. Connor;Dadmun, Mark D.
• 通讯作者: Dadmun, Mark D.