Continuous, Large-scale Manufacturing of Functionalized Silver Nanowire Transparent Conducting Films

功能化银纳米线透明导电薄膜的连续大规模制造

• 批准号: 1939018
• 负责人: Shohreh Hemmati
• 金额: $ 35.57万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-01-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1939018&HistoricalAwards=false
• 关键词: Continuous; Large; scale; Manufacturing; Functionalized; Continuous; Large; scale; Manufacturing; Functionalized

This research aims to discover a new technique for the economical manufacture of silver nanowire transparent conductive films for the Internet of Nano Things. The Internet of Nano Things promises to connect a new generation of sensors, transducers, data processors and communication devices for a smart and connected world. A vital component of all nanodevices is transparent conductive films, generally made of silver nanowires. Current manufacture of silver nanowires is costly as it involves multi-step batch production. This award investigates a new approach for large-scale manufacture of silver nanowires with direct coupling with a three-dimensional printing system for patterning of transparent conducting films. The reduced cost of transparent conducting films and print-on-demand silver nanowires hasten the adoption of devices for the Internet of Nano Things, which contributes to the U.S. economy and prosperity. This research combines aspects of manufacturing, material science, nanotechnology, chemistry, and engineering. Students actively participate in research thus achieving engineering expertise in advanced manufacturing, which is important to U.S. industry. Undergraduate and graduate students, particularly from under-represented groups, are encouraged to participate in research and training.This project studies the reaction conditions and mechanisms in a continuous reactor to produce silver nanowire (AgNW)-based conductive inks that can be continuously printed onto flexible substrates to create transparent conducting films (TCFs) for the Internet of Nano Things (IoNT). The current batch production of AgNWs involves the costly steps of selective separation and concentration of the desired AgNWs. In addition, AgNWs are prone to oxidation in harsh environments. This project studies a millifluidic system for the manufacture of monodispersed AgNWs with controllable length and aspect ratio and sufficient concentration for high performance TCFs. The millifluidic reactor is connected to a 3D printer for continuous manufacture and printing of AgNW-based TCFs with a reduction in cost while maintaining high print quality. In-situ monitoring of the millifluidic synthesis by X-ray absorption spectroscopy provides fundamental understanding of the reaction mechanisms. Mechanistic knowledge of the chemical reactions helps to achieve control over the aspect ratio and yield of the AgNWs. The AgNWs are modified using Pd nanoparticles via the galvanic replacement of Ag with Pd cations to achieve stability against oxidation. This research advances AgNW TCFs that are low cost, environmentally stable, with flexible/stretchable characteristics needed in applications such as IoNT devices with high potential for advancing the field of flexible electronics.This project is jointly funded by the Advanced Manufacturing Program and the Established Program to Stimulate Competitive Research (EPSCoR).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.

这项研究旨在发现一种新技术，用于经济制造纳米互联网的银纳米线透明导电膜。 Nano Internet的事物有望连接新一代的传感器，传感器，数据处理器和通信设备，以融入智能和连接的世界。 所有纳米版的重要组成部分是透明的导电膜，通常由银纳米线制成。 当前的银纳米线生产涉及多步批量生产，因此成本很高。 该奖项调查了一种新的方法，用于大规模制造银纳米线，并与三维印刷系统进行直接耦合，以模仿透明的导电膜。 透明的传导电影和按需打印的银纳米线的成本降低，加快了为纳米互联网的设备采用，这有助于美国经济和繁荣。 这项研究结合了制造，材料科学，纳米技术，化学和工程的各个方面。 学生积极参与研究，从而获得了高级制造业的工程专业知识，这对美国行业很重要。 鼓励本科生和研究生，特别是来自代表性不足的群体，参加研究和培训。本项目研究连续反应堆中的反应条件和机制，以产生基于银纳米线（AGNW）的导电油墨，这些导电油墨可以连续地打印在柔性基础上，以创建互联网（tcfs），以创建互联网（TCFS）。 当前的AGNWS生产涉及选择性分离和所需AGNW浓度的昂贵步骤。 另外，AGNW容易在恶劣的环境中氧化。该项目研究了一个毫米型系统，用于生产具有可控长度和纵横比和足够浓度的单分散Agnws，以实现高性能TCF。 毫米氟反应器连接到3D打印机，用于连续制造和印刷基于AGNW的TCF，并降低成本，同时保持高打印质量。 X射线吸收光谱对毫米流体合成的原位监测提供了对反应机制的基本理解。 化学反应的机械知识有助于控制AGNWS的长宽比和产量。 使用PD纳米颗粒通过用PD阳离子的电替换来修饰AGNW，以实现抗氧化的稳定性。这项研究推进了低成本，环境稳定的AGNW TCF，其在应用中所需的灵活/可伸展特性，例如具有高潜力的IONT设备，可以推进灵活电子产品领域的潜力。优点和更广泛的影响审查标准。