NIRT: Active Electromechanical Nanostructures Without the Use of Piezoelectric Constituents

NIRT：不使用压电元件的活性机电纳米结构

• 批准号: 0708096
• 负责人: Pradeep Sharma
• 金额: $ 121.85万
• 依托单位: University of Houston
• 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: 2007-08-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0708096&HistoricalAwards=false
• 关键词: NIRT; Active; Electromechanical; Nanostructures; Without

The objective of the proposed research is to promote a multi-disciplinary collaboration between theorists and experimentalists to understand and develop active nanostructured architectures such as nanocomposite skins and films that do not require any piezoelectric materials as constituents and in principle can be designed with any material combination. Modeling methods ranging from ab initio atomistic calculations to enriched continuum models will be employed to enhance understanding of flexoelectricity at the nanoscale and provide guidelines to select materials and engineer highly optimized, apparently piezoelectric nanostructures with the requisite symmetry, topology and size. The different topologies will be fabricated by precisely controlling the dispersion of suitably shaped nanoparticles in a polymer matrix (from soft elastomers to hard thermoplastics and thermosets) with external fields (flow, electrical & magnetic) as a means to tune the symmetry and provide the necessary 3-dimensional arrangement of the nanoinclusions. The expected benefits of the program will be both educational and societal. Anticipated research outcomes are an independence from Nature's limited selection of active electromechanical materials and an ability to design multifunctionality by assembling arbitrary non-active material combinations. Apart from resolutions of fundamental scientific questions related to piezoelectricity at the nanoscale, technological applications of the proposed research are anticipated in next generation actuators, sensors, MEMs and NEMs with consequent impact on diverse industries such as, Electronics, Space and Aerospace, Biomedical, Defense among others. The educational impact is that undergraduate and graduate students will be trained in emerging and interdisciplinary scholarly research. Research and education will be integrated by focusing on the education, outreach and recruitment through (1) Undergraduate summer research opportunities, (2) High School outreach using our existing NSF RET, REU and AGEP, and (3) Middle/High School student demonstrations. Research findings will be incorporated into courses, and broadly disseminated through conference presentations, scholarly publications, and the PIs's websites.

拟议的研究的目的是促进理论家和实验者之间的多学科合作，以理解和开发主动的纳米结构体系结构，例如纳米复合材料的皮肤和不需要任何压电材料的纳米复合材料皮肤和膜，可以原则上设计任何材料和任何材料组合。将采用从头算原子计算到富集的连续模型的建模方法，以增强对纳米级的柔韧性的了解，并为选择材料和工程师提供高度优化的材料，显然是压电的纳米结构，具有必要的对称性，拓扑，拓扑和尺寸。通过精确控制聚合物基质中适当形状的纳米颗粒的分散（从软弹性体到硬弹性塑料到硬塑料和热热器）中的适当形状形状的纳米颗粒的分散（流动，电流，电气和磁性）作为对称对称的一种手段，并提供必要的3二维安排。该计划的预期好处将是教育和社会。预期的研究结果是自然界有限选择的主机材料的独立性，并且通过组装任意非活动材料组合来设计多功能性。除了在纳米级的压电相关的基本科学问题的分辨率外，拟议研究的技术应用也预计在下一代执行器，传感器，MEM和NEMS中也会对诸如电子，太空和航空航天，生物医学，生物医学，国防等多种行业产生影响。教育的影响是，本科生和研究生将接受新兴和跨学科学术研究的培训。研究和教育将通过（1）本科夏季研究机会，（2）使用我们现有的NSF RET，REU和AGEP以及（3）中/高中生的演示来整合研究和教育。研究发现将纳入课程中，并通过会议演讲，学术出版物和PIS的网站大致传播。