Directed Assembly of Colloids for Nanomanufacturing of Hierarchically Ordered Electronic Films

用于分层有序电子薄膜纳米制造的胶体定向组装

• 批准号: 1538108
• 负责人: Margaret SobkowiczKline
• 金额: $ 30万
• 依托单位: University of Massachusetts Lowell
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1538108&HistoricalAwards=false
• 关键词: Directed; Assembly; Colloids; Nanomanufacturing; Hierarchically

The promise of polymer-based electronics is that energy harvesting, lighting and sensing applications can be achieved with cheap, flexible, lightweight and abundant plastics using faster, more efficient solution-based manufacturing. Current state-of-the-art processing for organic electronics employs toxic chlorinated organic solvents and relies on the uncontrolled self-assembly of the polymer as it solidifies from solution. Additional barriers to widespread adoption include reproducibility and lifetime issues associated with the scale-up of device manufacturing. This award aims to address these challenges through study of a novel nanomanufacturing paradigm. Water-based colloidal suspensions of electronic polymers will be assembled into hierarchical structures using external electric fields. This research will lead to cheaper, more reliable and sustainable solution-based processing of polymers for the manufacture of flexible electronics, photovoltaics and sensors. Integration of research into education will be an enduring impact of this project. Students will be involved at all levels, including undergraduates. Plans are to engage K-12 students, including minority and first-generation-to-college students, in the City of Lowell Public Schools by introducing the basics of nanotechnology and organic electronics with hands-on demonstrations and student mentoring.The objectives of this research project are to investigate a novel dielectrophoresis (DEP) technique to manufacture hierarchically ordered conjugated polymer films from colloidal suspensions and to create a new processing paradigm for organic electronics applications. This research will provide a new nanomanufacturing method for directed assembly of multicomponent nanoparticles into well-defined structured thin films over a range of length scales. Specifically, the tasks are (i) investigate of a novel DEP technique for hierarchical patterned deposition of colloidal nanoparticles of semiconducting polymers, (ii) elucidate the role of polymer nanoparticle preparation variables on particle size, colloidal stability and internal polymer chain structures, and (iii) characterize the relationship between this new manufacturing paradigm and polymer film morphology and electronic properties. By controlling the morphology of conjugated polymer thin films, the award will study the hypothesis that films from aqueous colloidal nanoparticle assembles are more suitable for devices with improved electronic properties compared to films prepared using conventional film-casting from organic solvents. The principles learned from this fundamental research will establish design rules for conjugated polymer nanoparticle assembly and enable creation of a "colloidal process engineering tool-kit". This will serve as the underpinning of continuous nanoparticle assembly and deposition to control thin-film morphologies that can be translated into innovative and versatile manufacturing processes for electronic devices.

基于聚合物的电子产品的前景是，能量收集、照明和传感应用可以通过使用更快、更高效的基于解决方案的制造，实现廉价、灵活、轻质和丰富的塑料。目前最先进的有机电子工艺采用有毒的氯化有机溶剂，并依赖于聚合物从溶液中固化时不受控制的自组装。广泛采用的其他障碍包括与设备制造规模扩大相关的可重复性和寿命问题。该奖项旨在通过研究一种新的纳米制造范式来解决这些挑战。水基胶体悬浮液的电子聚合物将组装成层次结构使用外部电场。这项研究将为柔性电子产品、光伏和传感器的制造带来更便宜、更可靠和可持续的聚合物加工解决方案。将研究与教育相结合将是这个项目的持久影响。包括本科生在内的各个层次的学生都将参与其中。该计划旨在吸引洛厄尔市公立学校K-12年级的学生，包括少数族裔和第一代大学生，通过实际演示和学生指导来介绍纳米技术和有机电子学的基础知识。本研究项目的目标是研究一种新的介电电泳（DEP）技术，从胶体悬浊液中制造分层有序的共轭聚合物薄膜，并为有机电子应用创造一种新的加工范式。这项研究将提供一种新的纳米制造方法，用于定向组装多组分纳米颗粒，使其在一定长度范围内形成结构良好的薄膜。具体来说，任务是(i)研究一种用于半导体聚合物胶体纳米颗粒分层模式沉积的新型DEP技术，（ii）阐明聚合物纳米颗粒制备变量对颗粒尺寸、胶体稳定性和内部聚合物链结构的作用，以及（iii）表征这种新的制造范式与聚合物薄膜形态和电子性能之间的关系。通过控制共轭聚合物薄膜的形态，该奖项将研究一种假设，即与使用传统有机溶剂制膜制备的薄膜相比，由水性胶体纳米颗粒组装而成的薄膜更适合用于具有改进电子性能的器件。从这项基础研究中学到的原理将建立共轭聚合物纳米颗粒组装的设计规则，并使创建“胶体工艺工程工具包”成为可能。这将作为连续纳米颗粒组装和沉积的基础，以控制薄膜的形态，可以转化为创新和通用的电子设备制造工艺。