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.

这项拟议的研究是针对主动纳米结构和纳米系统倡议提交的，NSF 06-595，类别NIRT。在纳米医学，纳米电子，纳米电子，太空探索，国土安全和防御中，需要进行驱动和感知的活跃纳米级结构和纳米系统。来自德克萨斯A＆M大学和佐治亚理工学院的Co-Pis的综合团队提出，作为一项联合研究工作，是一项全面的跨学科计划，用于分层制造和相变磁性记忆合金（MSMA）。技术：该提案的主要目标是建立一个分层框架，该框架将结合MSMA纳米层的制造与纳米线的挤出。然后，这些整体和杂化纳米线将通过同轴静电纺丝的制造中，用于制造纤维，用作可以通过温度，压力和磁场远程激活的设备。纳米制造的第一级将集中在薄膜上，该薄膜由纳米至微米尺寸的常规形状存储合金（SMA），磁性材料和MSMA组成，并使用磁铁溅射组成。然后，通过使用具有成本有效的液压挤压技术，薄膜将作为纳米线制造的前体。较高级别的纳米制造将涉及使用新型同轴静电纺丝，从而将纳米线在所选矩阵（例如二氧化硅）中排列，以制造生物传感器，远程控制的纳米/微作用器和主动介孔延展性粘膜膜。为了支持纳米制造工作，选择性的多尺度建模将涉及原子模拟，以解决纳米级的相变现象，以及基于微结构机制的连续性级别组成型模型，以解决纳米结构和纳米电视行为的功能。非技术性：拟议的研究将尝试开发具有形状内存和磁性特性的纳米线的多级制造方法。这种层次制造方法将通过平行的多尺度建模工作以及多尺度最先进的特征技术来帮助。这些独特的多功能纳米线将使用一种新型的同轴旋转方法来制造生物传感器。拟议的研究在科学上是显着意义的，因为它将揭示纳米级现象在晶体长度尺度上通过层次纳米制造出现较大尺度功能的影响。拟议的研究还将导致结构良好的层次制造方法和架构，用于新的多功能材料和设备，以用作工程应用中的传感器和执行器，从而促进了微型实施剂，生物传感器，阀门，阀门和主动介孔结构的设计。这些研究产生的知识可以彻底改变活跃的纳米和微尺度系统的设计以及能够经历非常快速可逆变形的组件，并表现出较高的致动，感应和有希望的发电特性。拟议的项目活动将包括开发多功能材料中的教学模块，以纳入本科课程；通过得克萨斯州A＆M和佐治亚理工学院之间的夏季合作交流计划丰富研究生和本科研究经验；开发活跃薄膜，纳米线和活跃纳米结构的研究生课程；通过参与的区域少数派服务大学的参与，并在二级教育计划的教育材料中注入实验室示范模型，该模型将与德克萨斯州A＆M的新成立的NSF NSF纳米级大学教育（NUE）计划协调。