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

Next Generation Colloidal Origami: Assembly of Directionally-Interacting Microcubes

下一代胶体折纸：定向相互作用微立方体的组装

基本信息

批准号：
1935248
负责人：
Orlin Velev
金额：
$ 44.9万
依托单位：
North Carolina 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：
2020-04-01 至 2025-03-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1935248&HistoricalAwards=false
关键词：
Next Generation Colloidal Origami Assembly

项目摘要

This project involves the assembly of colloidal particles and aims to expand fundamental understanding in the making of reconfigurable and active "colloidal origami" structures. The team will establish the principles underlying the magnetic-field-driven assembly of microscopic cube-shaped units whose sequence encodes their function, capability and utility. The scientific knowledge gained could enable future fabrication of soft, shape-changing and stimuli-responsive materials based on origami particle networks. The broader fundamental understanding of these emerging active systems will make possible the design of new materials that could find application in microrobotic manipulators, soft actuators, devices for harvesting and redirecting energy on the microscale, and biomedical applications such as magnetically-stimulated bioscaffolds. The project will also assist in educating a new generation of undergraduate and graduate students in multidisciplinary topics ranging from classical chemical engineering to the emerging areas of active and reconfigurable materials. The research team's high school and community outreach activities will be enhanced through exciting hands-on demonstrations with visually-attractive models of magnetic microbots and origami. The broad range of educational and outreach activities will be aimed towards middle and high school students, undergraduates with diverse backgrounds and graduate students, especially those from underrepresented groups in STEM fields. The project will advance fundamental science by establishing the principles that govern how a new class of engineered materials - magnetically-polarizable, cube-shaped microparticles - interact, assemble, reconfigure and propel in response to external magnetic and electric fields. The microscale metallo-dielectric units that will be assembled possess a unique combination of exciting features: they can (1) interact in a directionally-specific and controlled way, (2) store energy from a magnetic field, (3) release magnetic energy through re-configuration, and (4) use external electric energy as a source of self-propulsion, making them "active" particles. A combination of experiment and modeling of the assembly processes will make it possible to understand and control the formation of micro-origami components for novel smart materials and gels with on-demand reversible phase transitions. The first objective of the project is to establish the fundamental principles of interaction-driven assembly for two classes of microcubes. The team will investigate the types of phases formed, their structures, connectivity, and ability to re-configure on demand. The second objective is to explore how adding particle motility modifies the structure and properties of the assembled phases. The hypothesis is that the dynamic motility of the active particles could be used to produce new types of highly interconnected structures. The third objective is to embed the responsive and reconfigurable "origami" structures into soft matter media, thereby demonstrating new field-responsive materials with unusual properties that can be useful for real-world applications. The project will assist in the multidisciplinary education efforts of the researchers and will enhance their outreach activities by developing of hands-on demonstration capabilities.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.

该项目涉及胶体颗粒的组装，旨在扩大对可重构和活性“胶体折纸”结构的基本理解。该团队将建立磁场驱动的微观立方体形状单元组装的基本原理，这些单元的序列编码了它们的功能，能力和实用性。所获得的科学知识可以使未来基于折纸颗粒网络的柔软，形状变化和刺激响应材料的制造成为可能。对这些新兴主动系统的更广泛的基本理解将使新材料的设计成为可能，这些新材料可以应用于微机器人操纵器，软致动器，用于在微观尺度上收集和重定向能量的设备，以及生物医学应用，如磁刺激生物支架。该项目还将协助教育新一代的本科生和研究生的多学科主题，从经典的化学工程到活性和可重构材料的新兴领域。研究小组的高中和社区外展活动将通过激动人心的动手示范与磁性微型机器人和折纸的视觉吸引力的模型得到加强。广泛的教育和外联活动将针对初中和高中学生，具有不同背景的本科生和研究生，特别是那些来自STEM领域代表性不足的群体。该项目将通过建立管理一类新的工程材料-可磁化的立方体形状的微粒-如何响应外部磁场和电场相互作用，组装，重新配置和推进的原理来推进基础科学。将被组装的微尺度金属介电单元具有独特的激发特征组合：它们可以（1）以特定方向和受控的方式相互作用，（2）从磁场中储存能量，（3）通过重新配置释放磁能，以及（4）使用外部电能作为自推进的来源，使它们成为“活性”粒子。组装过程的实验和建模的结合将使人们有可能理解和控制新型智能材料和凝胶的微折纸组件的形成与按需可逆相变。该项目的第一个目标是建立两类微立方体的交互驱动组装的基本原则。该团队将调查形成的阶段的类型、它们的结构、连通性以及按需重新配置的能力。第二个目标是探索如何添加粒子运动修改组装相的结构和性质。该假说认为，活性粒子的动态运动性可以用来产生新型的高度互连的结构。第三个目标是将响应和可重构的“折纸”结构嵌入软物质介质中，从而展示具有不寻常特性的新的场响应材料，这些材料可用于现实世界的应用。该项目将有助于研究人员的多学科教育工作，并将通过开发实践演示能力来加强他们的推广活动。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。