Magnetic Field Directed Self-Assembly of Conjugated Rod-Coil Block Copolymers

共轭棒-线圈嵌段共聚物的磁场定向自组装

• 批准号: 0730062
• 负责人: Travis Bailey
• 金额: --
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0730062&HistoricalAwards=false
• 关键词: Magnetic; Field; Directed; Self; Assembly

Proposal Number: CBET- 0730062Principal Investigator: Travis S. BaileyUniversity/Institution: Colorado St. University Title: Magnetic Field Directed Self-Assembly of Conjugated Rod-Coil Block Copolymers The research concerns the effects of variable magnitude magnetic field (0 9.4 Tesla) on the self-assembled morphology and domain orientation of conjugated rod-coil block copolymers (RC BCPs) in both bulk phase and thin film environments. The designed research activities include both theoretical 3-D self-consistent field calculations and rigorous experimental analysis of synthetically derived systems based on poly(3-hexylthiophene) (P3HT) and poly(phenylene vinylene) (PPV) derivatives, and are the product of a collaborative effort among three CSU faculty (Bailey, Wang, Meersman). The anticipated success of the proposal is based on the established experience of Profs. Bailey and Wang with block copolymer self-assembly, and the expertise of Prof. Meersman with high magnetic field instrumentation. Intellectual Merit. Mounting evidence continues to highlight the critical importance of controlled nanoscale structure on the performance efficiency of conjugated polymer-based optoelectronic devices, such as LEDs, solar cells, and chemical and biological sensors. Exploiting the self-assembly of BCPs to generate nanoscale structure has long been recognized as a promising alternative to high cost lithographic processes. However, incorporation of rod-like conjugated polymers as constituent blocks in a BCP has been shown to have severe consequences on the phase behavior of such systems, the comprehensive nature of which has remained poorly understood due to limited synthetic access to such materials. However, on the heels of recent synthetic breakthroughs opening practical access to conjugated BCPs based on P3HT and PPV derivatives, the systematic unraveling of the phase behavior of these RC BCPs has now become viable. Our proposed investigations are based on a collaborative use of both theoretical and experimental analysis to strategically elucidate the rich complexity of behavior in these systems, and more importantly, probe the potential of strong magnetic fields as processing tools to maximize domain alignment and minimize defect densities in this important class of soft materials. Broader Impact. The scope of knowledge generated from these critically fundamental studies on the behavior of conjugated RC BCPs in the presence of strong magnetic fields will have direct and broad implications towards their integration into a range of technologically important application areas, including the fabrication of polymer-based photovoltaic cells, LEDs, chemical and biological sensors and field effect transistors. The interdisciplinary team of researchers assembled in this collaborative proposal (Bailey, Wang, and Meersman) represents two departments and two colleges at Colorado State University. The scope of work has been designed to capitalize on our strengths in synthetic and physical polymer chemistry, computational physics, and instrumentation for magnetic field generation. Thus, the collaboration between departments will strengthen and enhance the campus-wide infrastructure for future cross-cutting research-based graduate education. Modifications of existing superconducting magnets and design of inert gas sample chambers compatible with these magnets will provide lasting capabilities for the general study of magnetic field effects on structure in materials beyond those associated with this study. The results of the research activities will be integrated with our educational and diversity goals through a range of programs. These include regularly scheduled graduate and undergraduate level seminar series, special topics sections in our two polymer science courses, active undergraduate research programs, and a developing workshop series for regional (Colorado and Wyoming) high school science teachers on recent topics in nanotechnology, biotechnology, and biomaterials. Each of these programs actively focuses on maximizing participation of minority and underrepresented groups in the sciences, through close ties with CSU's outstanding diversity programs, including the Colorado PEAKS Alliance for Graduate Education and Professoriate Program (AGEP), the Louis Stokes Colorado Alliance for Minority Participation (LS CO-AMP), the Women and Minorities in Engineering Program (WMEP), as well as our student chapter of Society for Women in Engineering (SWE).

Proposal Number: CBET- 0730062Principal Investigator: Travis S. BaileyUniversity/Institution: Colorado St. University Title: Magnetic Field Directed Self-Assembly of Conjugated Rod-Coil Block Copolymers The research concerns the effects of variable magnitude magnetic field (0 9.4 Tesla) on the self-assembled morphology and domain orientation of conjugated rod-coil block copolymers (RC BCPS）在散装相和薄膜环境中。设计的研究活动包括基于聚（3-己基噻吩）（P3HT）和聚（苯基乙烯基）（PPV）衍生物的合成系统的理论3-D自一致的现场计算以及对合成系统的严格实验分析，并且是三种CSU Fectulty（Bailey，baileey，whang，serersman serersman）的合作工作的产物，是三种协作工作的产物。该提案的预期成功是基于教授的既定经验。贝利（Bailey）和王（Wang）带有块共聚物自组装，以及具有高磁场仪器的梅尔曼（Meersman）教授的专业知识。智力优点。越来越多的证据继续强调受控纳米级结构对基于共轭聚合物的光电设备的性能效率（例如LED，太阳能电池以及化学和生物传感器）的至关重要。长期以来，利用BCP的自组装产生纳米级结构是高成本光刻过程的有前途的替代方案。然而，已证明将类似杆状的共轭聚合物作为组成块作为组成块，对这种系统的相位行为产生了严重的后果，由于对这种材料的合成访问的有限，其全面的性质仍然很糟糕。然而，在最近的合成突破之后，基于P3HT和PPV衍生物的共轭BCP的实用访问的实际访问，这些RC BCPS的相位行为的系统解散现已变得可行。我们提出的研究是基于对理论和实验分析的协作使用，以战略性地阐明这些系统中行为的丰富复杂性，更重要的是，探测强磁场作为处理工具的潜力，以最大程度地提高域的对准并最大程度地减少这种重要材料类别中的缺陷密度。更广泛的影响。在存在强磁场的情况下，从这些关键的基本研究中产生的知识范围将对它们与一系列具有技术重要的应用领域的整合产生直接和广泛的影响，包括制造聚合物基于聚合物的光伏细胞，LED，化学和生物传感器和现场效应。研究人员的跨学科团队在此合作提案中（Bailey，Wang和Meersman）组成了组合，代表了科罗拉多州立大学的两个部门和两所学院。工作范围旨在利用我们在合成和物理聚合物化学，计算物理和磁场生成仪器方面的优势。因此，部门之间的合作将加强和增强校园范围内的基础设施，以实现未来的基于研究的研究生教育。现有的超导磁体的修改和与这些磁体兼容的惰性气体样品室的设计将为磁场对结构对结构的一般研究提供持久的功能，而与本研究相关的材料之外的材料。研究活动的结果将通过一系列计划与我们的教育和多样性目标整合在一起。其中包括定期安排的研究生和本科级研讨会系列，我们的两种聚合物科学课程中的特殊主题部分，活跃的本科研究计划以及一个开发的区域（科罗拉多州和怀俄明州）高中科学教师的研讨会系列，介绍了纳米技术，生物技术和生物机构的最新主题。这些计划中的每一个都积极着重于通过与CSU的杰出多样性计划的紧密联系，包括科罗拉多州峰会研究生教育和教授课程（agep），路易斯·斯托克斯·斯托克斯·斯托克·斯托克·斯托克·科罗拉多（Louis Stokes）的少数族裔参与（LS Co-app），妇女的妇女（ls Co-app），以及Eromens in Eromens in Eromens in Eromens in Eromens of Eromens in Eromens of Eromens in Eromens in Eromens in Eromens in Eromens in Eromens in Eromens in Eromens in Eromens，工程（SWE）。