RII Track-4:@NASA: Process-Structure-Property Relationship of the Hybrid Manufactured Multifunctional Mechano-Luminescence-Optoelectronic Fibers

RII Track-4：@NASA：混合制造的多功能机械-发光-光电纤维的工艺-结构-性能关系

• 批准号: 2327493
• 负责人: Donghyeon Ryu
• 金额: $ 29.98万
• 依托单位: New Mexico Institute of Mining and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2327493&HistoricalAwards=false
• 关键词: RII; Track; NASA; Process; Structure

A health monitoring wearable has been considered as one of the promising technological solutions to better understand how the human body behaves for health diagnosis/prognosis, fitness improvement, and human-machine interaction. However, the state-of-the-arts suffer from the battery-dependent external energy supply. This project aims to provide a technological breakthrough with the multifunctional mechano-luminescence-optoelectronic (MLO) fiber that is self-powered for strain sensing and generates electrical energy via two-step mechanical-radiant-electrical energy conversion. Additionally, this project aims to advance the national health, prosperity, and welfare and to secure the national defense by promoting the progress of science through in-depth understanding of the process-structure-property (PSP) relationship of the MLO fiber’s functional building blocks. The gained knowledge can help enhance human presence in space. This project can provide opportunities for students underrepresented in STEM at New Mexico Tech (NMT) by visiting NASA Ames Research Center (ARC) to work with world-renowned scientists in cutting-edge facilities on the novel research topics and potentially work for NASA. Also, a transdisciplinary graduate course will be created at NMT on a topic of advanced manufacturing with an emphasis on the PSP relationship. The project is envisioned to contribute to four key industries in New Mexico, including Aerospace & Defense, Biosciences, Intelligent Manufacturing, and Sustainable & Green Energy.In this project, in collaboration with Dr. Koehne at NASA ARC, the PI aims to advance knowledge in the PSP relationship of the functional building blocks of the MLO fibers that are fabricated using a hybrid manufacturing. The MLO fibers are composed of two functional building blocks: 1) mechano-luminescent (ML) copper-doped zinc sulfide (ZnS:Cu) and 2) mechano-optoelectronic poly(3-hexylthiophene) (P3HT). In the design of the MLO fiber, the mechanical-radiant and radiant-electrical energy conversions of the ML ZnS:Cu and MO P3HT, respectively, are coupled to generate direct current (DC) when exposed to external mechanical stimuli. The generated DC varies with a strain and a strain rate, which makes the MLO fiber multifunctional to perform as a self-powered strain sensor and a mechanical-radiant-electrical energy harvester. Knowledge can be acquired about how the MO P3HT that are deposited in thin film using air-brushing form lamellae and exhibit MO properties. Also, the PI expects to uncover the light emission mechanism of the ML phosphors that are embedded in polydimethylsiloxane (PDMS) under mechanical deformation and how the ML light emission is affected by the profile (e.g., shape, size, and doping concentration) of the ML microparticles and related to a strain and a strain rate. In addition, single-walled carbon nanotubes (SWNTs) will be used for designing the nano-structures of P3HT to attain target functionalities. The PI plans two research tasks on PSP studies on MO P3HT-SWNT and ML ZnS:Cu-PDMS to conduct at NASA ARC during three-month summer visits in Y1 and Y2. Also, before each summer visit, preliminary studies will be conducted at NMT for accumulating database to be used for designing nano-/micro-structures of the MO and ML functional building blocks through molecular dynamics modeling and simulations.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.

健康监测可穿戴设备被认为是一种有前途的技术解决方案，可以更好地了解人体的行为，从而实现健康诊断/预测、健身改善和人机交互。该项目旨在通过多功能机械-发光-光电（MLO）光纤提供技术突破，该光纤可自供电用于应变传感，并通过两步机械-辐射-电产生电能。此外，该项目旨在通过深入了解MLO纤维的工艺-结构-性能（PSP）关系来促进科学进步，从而促进国民健康、繁荣和福利并确保国防。所获得的知识可以帮助增强人类在太空中的存在感。该项目可以通过参观 NASA 艾姆斯研究中心 (ARC) 为新墨西哥理工学院 (NMT) 中 STEM 领域代表性不足的学生提供与世界知名科学家合作进行切割的机会。 - 边缘设施此外，NMT 将开设一门以先进制造为主题的跨学科研究生课程，重点关注 PSP 关系，该项目预计将为新墨西哥州的四个关键行业做出贡献，其中包括航空航天。与国防、生物科学、智能制造以及可持续和绿色能源。在这个项目中，PI 与 NASA ARC 的 Koehne 博士合作，旨在增进对所制造的 MLO 纤维功能构件的 PSP 关系的了解使用MLO 纤维由两种功能构件组成：1) 机械发光 (ML) 铜掺杂硫化锌 (ZnS:Cu) 和 2) 机械光电聚 (3-己基噻吩) (P3HT)。 MLO 光纤的设计、ML ZnS:Cu 和 MO P3HT 的机械辐射能和辐射电能转换分别为当受到外部机械刺激时，MLO 光纤耦合产生直流电 (DC)，所产生的直流电随应变和应变率变化，这使得 MLO 光纤具有多功能性，可作为自供电应变传感器和机械辐射电能。可以获得有关使用喷枪沉积在薄膜中的 MO P3HT 如何形成薄片并表现出 MO 特性的知识。此外，PI 还希望揭示嵌入的 ML 荧光粉的发光机制。机械变形下的聚二甲基硅氧烷（PDMS）以及ML光发射如何受到ML微粒的轮廓（例如形状、尺寸和掺杂浓度）的影响以及与应变和应变率的关系。此外，单壁碳。纳米管（SWNT）将用于设计 P3HT 的纳米结构，以实现目标功能。PI 计划开展两项关于 MO P3HT-SWNT 和 ML 的 PSP 研究任务。 ZnS:Cu-PDMS 将在 Y1 和 Y2 为期三个月的夏季访问期间在 NASA ARC 进行。此外，在每次夏季访问之前，将在 NMT 进行初步研究，以积累用于设计纳米/微米结构的数据库。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。