Ultrasound directed self-assembly of non-periodic patterns of particles

超声引导非周期粒子自组装

• 批准号: 2246277
• 负责人: Bart Raeymaekers
• 金额: $ 35.45万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-15 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2246277&HistoricalAwards=false
• 关键词: Ultrasound; directed; self; assembly; non

This award supports research into the theoretical and experimental foundation required to organize and orient particles dispersed in a fluid medium into specific patterns, using the forces associated with an ultrasound wave field. The research specifically focuses on using multi-frequency rather than single-frequency ultrasound wave fields to enable assembling arbitrary, non-periodic patterns of particles. A host of engineering applications could benefit from this research, including particle and cell separation processes, mixing and dispersion control of suspensions, non-contact particle manipulation, and manufacturing of engineered composite materials with tailored properties. Fundamental theory to optimize the parameters (amplitude, phase, and set of frequencies) to assemble any pattern of spherical particles in multiple dimensions will be developed. Broadening participation of underrepresented groups in STEM education will be promoted by partnering with the Center for Enhancement of Engineering Diversity at Virginia Tech and contributing to the Computers and Technology summer camp and the Women’s Preview Weekend.The research objective of this award is to theoretically derive and experimentally validate the scientific foundation that enables organizing and orienting particles dispersed in a fluid medium into any periodic or non-periodic pattern, utilizing the forces associated with a multi-frequency ultrasound wave field. A theoretical and experimental study will be implemented that covers four technical thrusts to solve this problem. They include: 1) derivation of multi-frequency ultrasound directed self-assembly (DSA) theory for both spherical and high aspect ratio particles, 2) experimental validation of the multi-frequency ultrasound DSA theory, 3) integration of multi-frequency ultrasound DSA with vat-polymerization AM to demonstrate proof-of-concept of manufacturing polymer matrix composite materials with tailored properties, and 4) packaging the knowledge resulting from this research in an open-source software tool to make it accessible for other users. Together, the outcomes of these four research thrusts will describe the physical underpinnings of ultrasound DSA based on multi-frequency wave fields. The results of this award will advance discovery, implementation, and deployment of external field DSA methods, and control of organization and orientation of particulates within multiphase mixtures.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.

该奖项支持使用与超声波场相关的力，将分散在流体培养基中的理论和实验基础进行研究。该研究特别着重于使用多频率而不是单频超声波场来实现颗粒的任意，非周期性模式。许多工程应用可以从这项研究中受益，包括粒子和细胞分离过程，悬浮液的混合和分散控制，非接触式粒子操纵以及具有量身定制特性的工程复合材料的制造。将开发出优化参数（幅度，相位和频率集）以组装任何在多个维度上的球形粒子模式的基本理论。 Broadening participation of underrepresented groups in STEM education will be promoted by partnering with the Center for Enhancement of Engineering Diversity at Virginia Tech and contributing to the Computers and Technology Summer Camp and the Women’s Preview Weekend.The research objective of this award is to theoretically derive and experimentally validate the scientific foundation that enables organizing and orienting particles dispersed in a fluid medium into any periodic or non-periodic pattern, utilizing the与多频超声波场相关的力。将实施一项理论和实验研究，其中涵盖了解决此问题的四个技术推力。 They include: 1) derivation of multi-frequency ultrasound directed self-assembly (DSA) theory for both spherical and high aspect ratio particles, 2) experimental validation of the multi-frequency ultrasound DSA theory, 3) integration of multi-frequency ultrasound DSA with vat-polymerization AM to demonstrate proof-of-concept of manufacturing polymer matrix composite materials with tailored properties, and 4）在开源软件工具中将这项研究产生的知识包装，以使其可供其他用户访问。总之，这四个研究推力的结果将描述基于多频波场的超声DSA的物理基础。该奖项的结果将提高外部现场DSA方法的发现，实施和部署，以及对多相混合物中组成部分的组织和方向的控制。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准来通过评估来诚实地支持。