权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

ISS: Kinetics of nanoparticle self-assembly in directing fields

ISS：定向场中纳米粒子自组装的动力学

基本信息

批准号：
1637991
负责人：
Eric Furst
金额：
$ 30万
依托单位：
University of Delaware
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1637991&HistoricalAwards=false
关键词：
ISS Kinetics nanoparticle self assembly

项目摘要

CBET - 1637991PI: Furst, Eric M.The number of advanced materials manufactured by assembling colloidal particles is growing. The assembly can be controlled by applying external fields that affect the motion of the particles and their arrangement during assembly. This project will use facilities on board the International Space Station (ISS) to study the assembly of ellipsoidal magnetic particles in the presence of a toggled magnetic field. The microstructure of the suspension as the particles assemble will be characterized by light microscopy. Mechanical properties of the particle assemblies, especially buckling instabilities, will also be characterized. The microgravity environment of the ISS is important for these experiments, because the particles would sediment due to gravity with a sedimentation rate that increases as the they form large and complicated structures. The project will provide opportunities for students to participate in research, including K-12 students who participate in the University of Delaware's summer Young Engineers Camp and Exploring Engineering Camp. Undergraduates will be recruited to the project through the university's Undergraduate Research Program. The ISS experiments in this project will be conducted using InSPACE hardware and microgravity sciences glovebox. Experiments will be performed with magnetic prolate ellipsoids with aspect ratios ranging from 2:1 to 4:1. Experiments involving spheres will also be conducted for comparison purposes. The particle orientation will be determined from birefringence measurements using crossed polarizers. The effects of particle shape, anisotropy, and magnetic field toggling frequency on the phase separation of particles will be examined. Relatively short duration, ground-based experiments will be conducted using the same magnetic particles to provide additional details about structure formation from particle-level to mesoscale structure. The colloidal ellipsoids examined in this project could serve as building blocks for phononic bandgap materials that control the propagation of sound and heat, ultra-low thermal conductivity coatings, and photonic crystals with rich structural color. The research team will use the project to engage the public by producing segments for a variety of media outlets, especially those that concentrate on space-based research.

CBET -1637991 PI：Furst，Eric M.通过组装胶体颗粒制造的先进材料的数量正在增长。可以通过施加影响颗粒的运动及其在组装期间的布置的外部场来控制组装。该项目将利用国际空间站（ISS）上的设施研究在切换磁场存在下椭球磁性粒子的组装。通过光学显微镜表征颗粒组装时悬浮液的微观结构。颗粒集合体的机械性能，特别是屈曲不稳定性，也将被表征。国际空间站的微重力环境对这些实验很重要，因为粒子会因重力而沉积，随着它们形成大型和复杂的结构，沉积速率会增加。该项目将为学生提供参与研究的机会，包括参加特拉华州大学夏季青年工程师夏令营和探索工程夏令营的K-12学生。本科生将通过大学的本科研究计划被招募到该项目。该项目中的国际空间站实验将使用InSPACE硬件和微重力科学手套箱进行。实验将进行磁长椭球体的纵横比范围从2：1至4：1。还将进行涉及球体的实验以进行比较。颗粒取向将通过使用交叉偏振器的双折射测量来确定。粒子的形状，各向异性，和磁场切换频率上的粒子的相分离的影响将被检查。将使用相同的磁性粒子进行持续时间相对较短的地基实验，以提供有关从粒子级到中尺度结构的结构形成的更多细节。在这个项目中研究的胶体椭球体可以作为声子带隙材料的构建块，控制声音和热量的传播，超低热导率涂层，和光子晶体具有丰富的结构色彩。研究小组将利用该项目，通过为各种媒体特别是那些侧重于天基研究的媒体制作片段，吸引公众参与。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Quantization of Acoustic Modes in Dumbbell Nanoparticles

哑铃纳米粒子中声学模式的量化

DOI：
10.1103/physrevlett.128.048003
发表时间：
2022
期刊：
Physical Review Letters
影响因子：
8.6
作者：
Wang, Zuyuan;Kim, Hojin;Secchi, Maria;Montagna, Maurizio;Furst, Eric M.;Djafari-Rouhani, Bahram;Fytas, George
通讯作者：
Fytas, George

Ultrathin Shell Layers Dramatically Influence Polymer Nanoparticle Surface Mobility