Collaborative Research: Continuous Manufacturing of Hetero-Nanostructures Enabled by Colloidal Atomic Layer Deposition

合作研究：通过胶体原子层沉积实现异质纳米结构的连续制造

• 批准号: 1903112
• 负责人: Jonathan Owen
• 金额: $ 20.63万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903112&HistoricalAwards=false
• 关键词: Collaborative; Research; Continuous; Manufacturing; Hetero

Cadmium selenide nanoplatelets are attractive materials for next generation, energy efficient displays and solid-state lighting devices. The synthesis of high-quality nanoplatelets is a multi-step process that is difficult to study and scale up using conventional approaches. This award supports collaborative research to develop a continuous manufacturing strategy that consistently produces highly efficient nanoplatelets. The projected strategy utilizes a layer-by-layer growth process that enables cost-effective synthesis of the high-performance nanomaterials. The project contributes to fundamental knowledge of the nanoplatelet growth process, the requirements of flow synthesis methods, and determine nanoplatelet structure through photoluminescence-performance relationships. If successful, the research could reduce the energy consumption of displays and solid-state lighting devices produced by mid to large-scale U.S. companies, and thereby benefit the nation's prosperity, health, and security. This collaborative research project involves integration of several fields including colloidal synthesis, reaction and chemical engineering, and materials science. This grant trains graduate and undergraduate students in the continuous manufacture of advanced materials. Additionally, the multi-disciplinary nature of this project facilitates participation of women and underrepresented groups in research and greatly impacts engineering education through hands-on experiments for undergraduate students. Furthermore, the YouTube is used to disseminate the acquired advanced manufacturing knowledge to a broader audience.The continuous flow manufacturing process based on the colloidal atomic layer deposition (ALD) technique for synthesis of high-quality nanoplatelets is highly modular and versatile. Continuous flow manufacturing has the potential to overcome the current limitations of the batch scale production of emissive nanomaterials. However, some key scientific questions need to be thoroughly explored to realize the continuous manufacturing of semiconductor nanoplatelets using the colloidal ALD process. This research project develops the fundamental knowledge required for each step of the layer-by-layer growth process for nanomaterial synthesis. The continuous flow synthesis process is capable of synthesizing and purifying colloidal nanoplatelet heterostructures using a linear sequence of multiple reactor modules. The nanoplatelets manufactured in continuous flow are composed of a graded alloy emissive layer and several passivating shell layers engineered for solid-state lighting and micro-display applications. Continuous flow reactor design, a library of novel synthesis precursors, and in-line liquid-liquid phase separation technique enable unprecedented process intensification in advanced manufacturing of colloidal nanoplatelets. The novel continuous manufacturing process utilizing intensified flow reactors paves the way for in-flow manufacturing of other colloidal nanocrystals.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.

硒化镉纳米片是下一代节能显示器和固态照明设备的有吸引力的材料。高质量纳米血小板的合成是一个多步骤的过程，很难使用传统方法进行研究和放大。该奖项支持合作研究，以开发持续生产高效纳米血小板的连续制造策略。该策略采用逐层生长工艺，能够经济高效地合成高性能纳米材料。该项目有助于了解纳米血小板生长过程的基础知识、流动合成方法的要求，并通过光致发光-性能关系确定纳米血小板结构。如果成功，该研究可以减少美国大中型公司生产的显示器和固态照明设备的能耗，从而有利于国家的繁荣、健康和安全。该合作研究项目涉及胶体合成、反应与化学工程、材料科学等多个领域的整合。该补助金培训研究生和本科生进行先进材料的连续制造。此外，该项目的多学科性质促进了女性和代表性不足群体参与研究，并通过本科生的实践实验极大地影响了工程教育。此外，YouTube还用于向更广泛的受众传播所获得的先进制造知识。基于胶体原子层沉积（ALD）技术合成高质量纳米片的连续流制造工艺具有高度模块化和多功能性。连续流制造有潜力克服目前发射纳米材料批量生产的限制。然而，要实现利用胶体 ALD 工艺连续制造半导体纳米片，还需要深入探讨一些关键的科学问题。该研究项目开发了纳米材料合成的逐层生长过程的每个步骤所需的基础知识。连续流合成工艺能够使用线性序列的多个反应器模块来合成和纯化胶体纳米片异质结构。连续流制造的纳米片由梯度合金发射层和几个专为固态照明和微显示应用而设计的钝化壳层组成。连续流反应器设计、新型合成前体库和在线液-液相分离技术使胶体纳米片的先进制造实现了前所未有的工艺强化。利用强化流反应器的新型连续制造工艺为其他胶体纳米晶体的连续制造铺平了道路。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力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

Synthesis of graded CdS 1−x Se x nanoplatelet alloys and heterostructures from pairs of chalcogenoureas with tailored conversion reactivity

利用具有定制转化反应性的成对硫属脲合成分级 CdS 1–x Se x 纳米片合金和异质结构

• DOI: 10.1039/d3sc03384h
• 发表时间: 2023-11
• 期刊: Chemical Science
• 影响因子: 8.4
• 作者: Saenz, Natalie;Hamachi, Leslie S.;Wolock, Anna;Goodge, Berit H.;Kuntzmann, Alexis;Dubertret, Benoit;Billinge, Isabel;Kourkoutis, Lena F.;Muller, David A.;Crowther, Andrew C.;et al
• 通讯作者: et al