Active NIRT: Hierarchical Manufacturing and Modeling for Phase Transforming Active Nanostructures

Active NIRT：相变活性纳米结构的分层制造和建模

• 批准号: 0709283
• 负责人: Dimitris Lagoudas
• 金额: $ 100万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0709283&HistoricalAwards=false
• 关键词: Active; NIRT; Hierarchical; Manufacturing; Modeling

This proposed research was submitted in response to the Active Nanostructures and Nanosystems initiative, NSF 06-595, category NIRT. Active nanoscale structures and nanosystems capable of actuation and sensing are needed for a wide range of applications in nanomedicine, nanoelectronics, space exploration, homeland security and defense. An integrated team of co-PIs from Texas A&M University and Georgia Tech proposes, as a combined research effort, a comprehensive interdisciplinary program in hierarchical manufacturing and modeling for phase transforming magnetic shape memory alloys (MSMA). Technical: The main goal of the proposal is to establish a hierarchical framework that will combine the fabrication of MSMA nanolayers with the extrusion of nanowires. These monolithic and hybrid nanowires will then be used in the fabrication of fibers, by coaxial electrospinning, to be used as devices that can be activated by temperature, stress, and remotely by magnetic field. The first level of nanomanufacturing will focus on thin films, composed of nano to micron size layers of conventional shape memory alloys (SMA), magnetic materials and MSMA using magnetron sputtering. Thin films will then serve as precursor for nanowire fabrication by using a cost effective hydraulic pressure extrusion technique. The higher level nanomanufacturing will involve the use of a novel coaxial electrospinning whereby nanowires will be aligned in selected matrices such as silica for the purpose of making biosensors, remotely controlled nano/micro actuators, and active mesoporous ductile membranes. To support the nanomanufacturing effort, selective multiscale modeling will involve atomistic simulations to address phase transformation phenomena at nanoscale, and microstructural mechanism-based continuum level constitutive models to address the functionality of the nanostructures and nanodevice behavior. Nontechnical: The proposed research will attempt to develop a multilevel fabrication methodology for nanowires with combined shape memory and magnetic properties. This hierarchical fabrication methodology will be assisted by a parallel multiscale modeling effort, and also by multiscale state-of-the-art characterization techniques. These unique multifunctional nanowires will be utilized in the manufacturing of biosensors using a novel coaxial electrospinning method. The proposed research is scientifically significant because it will reveal the effect of nanoscale phenomena occurring at crystallographic length scales on larger scale functionality through hierarchical nanomanufacturing. The proposed research will also result in well-structured hierarchical fabrication methodologies and architectures for new multifunctional materials and devices to be used as sensors and actuators in engineering applications, facilitating the design of micro-actuators, biosensors, valves and active mesoporous structures. The knowledge generated from these studies could revolutionize the design of active nano and micro-scale systems and components capable of undergoing very fast reversible deformations, and exhibiting high actuation, sensing and promising power generation characteristics. The proposed project activities will include the development of teaching modules in multifunctional materials for incorporation into undergraduate courses; enrichment of graduate and undergraduate research experiences through summer collaborative exchange programs between Texas A&M and Georgia Tech; development of a graduate course in active thin films, nanowires and active nanostructures; involvement of underrepresented groups through participating regional minority serving universities, and injection of laboratory demonstration models in educational material for secondary educational programs, which will be coordinated with the newly established NSF Nanoscale Undergraduate Education (NUE) program at Texas A&M.

这项拟议的研究是为了响应主动纳米结构和纳米系统倡议，NSF 06-595，类别NIRT。在纳米医学、纳米电子学、空间探索、国土安全和国防等领域的广泛应用中，需要能够驱动和传感的有源纳米结构和纳米系统。来自德克萨斯A M大学和格鲁吉亚理工学院的一个综合性的合作PI团队提出，作为一个综合的研究工作，一个全面的跨学科计划，在分层制造和建模的相变磁性形状记忆合金（MSMA）。技术支持：该提案的主要目标是建立一个分层框架，将联合收割机的MSMA纳米层的制造与纳米线的挤出相结合。然后，这些单片和混合纳米线将用于通过同轴静电纺丝制造纤维，用作可以通过温度，应力和磁场远程激活的设备。纳米制造的第一个层次将集中在薄膜上，由纳米到微米尺寸的传统形状记忆合金（SMA），磁性材料和MSMA层组成，使用磁控溅射。然后，薄膜将作为纳米线制造的前体，通过使用具有成本效益的液压挤出技术。更高层次的纳米制造将涉及使用一种新的同轴静电纺丝，其中纳米线将在选定的矩阵，如二氧化硅对齐的目的，使生物传感器，远程控制的纳米/微致动器，和活性中孔延性膜。为了支持纳米制造的努力，选择性的多尺度建模将涉及原子模拟，以解决在纳米尺度上的相变现象，和基于微观结构机制的连续体水平的本构模型，以解决纳米结构和纳米器件行为的功能。非技术性：这项研究将尝试开发一种具有形状记忆和磁性相结合的纳米线的多级制造方法。这种分层制造方法将有助于并行多尺度建模工作，也通过多尺度最先进的表征技术。这些独特的多功能纳米线将被用于制造生物传感器使用一种新的同轴静电纺丝方法。这项研究具有科学意义，因为它将揭示在晶体学长度尺度上发生的纳米级现象通过分级纳米制造对更大规模功能的影响。拟议的研究还将产生结构良好的分层制造方法和架构，用于新的多功能材料和设备，用于工程应用中的传感器和致动器，促进微致动器，生物传感器，阀门和活性中孔结构的设计。从这些研究中产生的知识可以彻底改变主动纳米和微米级系统和组件的设计，这些系统和组件能够经历非常快速的可逆变形，并表现出高致动，传感和有前途的发电特性。拟议的项目活动将包括开发多功能材料的教学模块，以纳入本科课程;通过得克萨斯A M和格鲁吉亚理工学院之间的夏季合作交流计划，丰富研究生和本科生的研究经验&;开发活性薄膜、纳米线和活性纳米结构的研究生课程;通过参与区域少数民族服务大学，让代表性不足的群体参与，并在中等教育方案的教材中加入实验室示范模式，该项目将与德克萨斯大学新成立的NSF纳米级本科教育（NUE）项目相协调&。