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Surface-enabled Manufacturing of Nanowheels for Metamaterial and Nanomotor Applications

用于超材料和纳米电机应用的纳米轮的表面制造

基本信息

批准号：
1762616
负责人：
David W. Marr
金额：
$ 40.12万
依托单位：
Colorado School of Mines
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-15 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1762616&HistoricalAwards=false
关键词：
Surface enabled Manufacturing Nanowheels Metamaterial

项目摘要

Colloidal assembly is envisioned as an effective method for the bottom-up fabrication of nanostructures for a broad range of applications from sensors to photonics to biomedical devices. This award investigates the application of rotating magnetic fields to paramagnetic nanoparticle colloids to form wheel-like clusters well suited for assembly into metamaterials and nanomotors. The process involves manipulating interparticle interactions and thus controlling colloidal structure formation. This project shows a microfluidic pathway to fabricating complex three-dimensional nanowheels. Potential applications of the nanowheels are in building optical metamaterials and disrupting bacterial biofilms. One potential near-term benefit of nanowheels and nanomotors is their use in medicine. Colloidal nanowheels can ablate blood clots using a physiochemical mechanism that results in dissolution rates significantly higher than clot dissolving drugs. Thus, the project outcomes potentially impact national health and well-being. The research on nanowheel manufacturing and translation is integrated with education and outreach programs to inspire young students in the field of colloid and interfacial science. Research results are incorporated into undergraduate and graduate courses. Plans are to enhance diversity in research programs by involving undergraduate students and recruiting talented underrepresented high school students and mentor them toward university study in science and engineering.Many desired colloidal nanostructures are inaccessible because of thermodynamic and kinetic constraints on their assembly and separation from the mixture. This project overcomes these limitations and shows a microfluidic pathway to fabricating complex three-dimensional nanowheels of different size, shape and composition. The research work takes advantage of the nanowheels' unique rolling behavior on topographically patterned surfaces to fractionate them into purified streams based on size and shape. The project's experimental framework, inspired by rotation of nanowheels and their interaction with properly designed roads, provides a transformative route to assemble and fractionate colloidal clusters efficiently. The underlying nanowheel rotation mechanism that exists at the interplay of fluid mechanics, field directed assembly, and tribology represents a significant advancement in the field of colloidal assembly. The outcome of these studies is a new assembly approach that accelerates translation of colloidal assembly into practical applications.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.

胶体组装被认为是一种自下而上制造纳米结构的有效方法，适用于从传感器到光子学再到生物医学设备的广泛应用。该奖项研究了旋转磁场在顺磁性纳米颗粒胶体中的应用，以形成非常适合组装成超材料和纳米电机的轮状簇。该过程涉及操纵颗粒间相互作用，从而控制胶体结构的形成。该项目展示了制造复杂三维纳米轮的微流体途径。纳米轮的潜在应用是构建光学超材料和破坏细菌生物膜。纳米轮和纳米电机的一项潜在近期好处是它们在医学中的应用。胶体纳米轮可以利用物理化学机制消融血栓，其溶解速率明显高于血栓溶解药物。因此，项目成果可能会影响国民健康和福祉。纳米轮制造和转化的研究与教育和推广计划相结合，以激励胶体和界面科学领域的年轻学生。研究成果被纳入本科生和研究生课程。计划是通过让本科生参与和招募有才华的代表性不足的高中生来增强研究项目的多样性，并指导他们进入科学和工程领域的大学学习。由于热力学和动力学对其组装和从混合物中分离的限制，许多所需的胶体纳米结构是无法获得的。该项目克服了这些限制，并展示了制造不同尺寸、形状和成分的复杂三维纳米轮的微流体途径。该研究工作利用纳米轮在地形图案表面上独特的滚动行为，根据尺寸和形状将其分离成纯化的流。该项目的实验框架受到纳米轮旋转及其与适当设计的道路相互作用的启发，提供了一条有效组装和分级胶体簇的变革性途径。流体力学、场定向组装和摩擦学相互作用中存在的基础纳米轮旋转机制代表了胶体组装领域的重大进步。这些研究的成果是一种新的组装方法，可加速胶体组装转化为实际应用。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。