Piezo- and Ferro- Electricity of One Dimensional Nanomaterials

“一维纳米材料中的压电性和铁电性”(CMS 0324643)：该项目旨在从根本上了解低维的压电性和铁电性效应，以开发对纳米级机电系统至关重要的新型纳米级器件。这个尚未被广泛研究的课题与纳米科学技术的进一步发展密切相关。(1)发展研究纳米尺度的压电性和铁电性的实验能力；(2)演示和验证BN和BaTiO_3纳米线的压电性；(3)研究压电和/或铁电效应与尺寸、形状和外部载荷的依赖关系；以及(4)制作和表征集成BN和/或BaTiO_3纳米线的纳米传感器和致动器。这项研究是在多探针自由空间纳米操纵和表征能力的帮助下完成的，该能力与电子显微镜内的实时可视化和纳米材料处理相结合。这项研究不仅将拓展我们在低维压电性和铁电性方面的科学知识，而且将在纳米技术的纳米尺度表征、驱动和传感方面实现工程化突破。它还包括一项整合和教育学生的全面计划，并促进公众参与新的科学研究。

Abstract for "Piezo- and Ferro- electricity in 1-D nanomaterials" (CMS 0324643):The project is aimed to achieve fundamental understanding of the piezoelectric and ferroelectric effects at low dimension for the purpose of developing novel nanoscale devices critical for nanoscale electromechanical systems. The subject, which has not been extensively studied yet, is critically related to the further advance of nanoscale science and technology. Efforts are made: (1) to develop experimental capabilities for the study of piezoelectricity and ferroelectricity at the nanoscale; (2) to demonstrate and verify the piezoelectricity of BN and BaTiO3 nanowires; (3) to study the dependence of the piezoelectric and/or ferroelectric effects on size, shape and external load; and (4) to prototype and characterize nanoscale sensors and actuators integrating BN and/or BaTiO3 nanowires. The study is accomplished with the aid of multi-probe free-space nanomanipulation and characterization capabilities integrated with real-time visualization and nanoscale materials processing inside electron microscope. The research will not only expand our scientific knowledge on low dimensional piezoelectricity and ferroelectricity, but also achieve engineering breakthroughs on nanoscale characterization, actuation and sensing for nanotechnology. It includes also a comprehensive plan for integrating and educating students, and promoting the public engagement in new scientific research.