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已被认为是有前途的技术解决方案之一，可以更好地了解人体的健康诊断/预后，健身改善和人机交互行为。然而，现有技术受到电池依赖的外部能量供应的影响。该项目旨在提供多功能机械发光光电（MLO）光纤的技术突破，该光纤自供电用于应变传感，并通过两步机械辐射电能转换产生电能。此外，该项目旨在通过深入了解MLO光纤功能构建块的工艺-结构-性能（PSP）关系，促进科学进步，促进国民健康，繁荣和福利，并确保国防。获得的知识可以帮助增强人类在太空的存在。这个项目可以为学生提供机会，在干在新墨西哥州技术（NMT）通过访问美国宇航局艾姆斯研究中心（ARC）与世界知名的科学家在尖端设施的新颖的研究课题和潜在的工作为美国宇航局。此外，一个跨学科的研究生课程将在NMT创建一个先进制造的主题，重点是PSP的关系。该项目预计将为新墨西哥州的四个关键行业做出贡献，包括航空航天国防、生物科学、智能制造和可持续绿色能源。在该项目中，PI与NASA ARC的Koehne博士合作，旨在推进使用混合制造的MLO光纤的功能构建块的PSP关系的知识。MLO纤维由两种功能性结构单元组成：1）机械发光（ML）铜掺杂的硫化锌（ZnS：Cu）和2）机械光电聚（3-己基噻吩）（P3 HT）。在MLO光纤的设计中，ML ZnS：Cu和MO P3 HT的机械-辐射和辐射-电能转换分别耦合以在暴露于外部机械刺激时产生直流电（DC）。产生的DC随应变和应变率而变化，这使得MLO光纤多功能地用作自供电应变传感器和机械-辐射-电能采集器。可以获得关于使用喷枪沉积成薄膜的MO P3 HT如何形成层状结构并表现出MO性质的知识。此外，PI期望揭示在机械变形下嵌入聚二甲基硅氧烷（PDMS）中的ML磷光体的发光机制以及ML发光如何受到轮廓的影响（例如，形状、尺寸和掺杂浓度）并且与应变和应变速率相关。此外，单壁碳纳米管（SWNTs）将用于设计P3 HT的纳米结构以实现目标功能。PI计划在Y1和Y2的三个月夏季访问期间在NASA ARC进行两项关于MO P3 HT-SWNT和ML ZnS：Cu-PDMS的PSP研究的研究任务。此外，在每年夏季访问之前，NMT将进行初步研究，以积累用于通过分子动力学建模和模拟设计MO和ML功能构建块的纳米/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。