Size-Dependent Super-Piezoelectricity in Nanostructures

纳米结构中尺寸相关的超压电

• 批准号: 0826153
• 负责人: Pradeep Sharma
• 金额: $ 38.96万
• 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: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0826153&HistoricalAwards=false
• 关键词: Size; Dependent; Super; Piezoelectricity; Nanostructures

Size-dependent ?super-piezoelectricity? in nanostructuresThis grant provides funding for a combined theoretical and experimental study to understand the emergence of size-dependent ?giant? piezoelectricity in ferroelectric nanostructures. Modeling approaches ranging from quantum mechanical atomistic calculations to continuum methods will be employed to understand the basic science underpinning this phenomenon. Flexure, artificial cracks and indentation based experiments on inhomogeneously strained nanostructures will be conducted to verify the predictions. The expected benefits of the program will be both educational and societal. Piezoelectricity, the development of electrical polarization upon mechanical stimulus and thus the conversion of mechanical to electrical energy, has numerous applications ranging from simple consumer products such as cell phones to complex technological advancements: atomic force microscopy, sonars and artificial muscles among many others. Accordingly, anticipated research outcomes are in next generation sensors and actuators, energy harvesting, artificial muscles that exhibit simultaneously large motion and force and an enhanced understanding of how to design multi-functionality. The educational impact is that both undergraduate and graduate students will be trained in emerging and interdisciplinary research that falls at the intersections of materials science, mechanics, and physics. The grant puts specific emphasis on research experience for high school students and undergraduate students and in particular female scholars. Research findings will be incorporated into courses, modules specifically targeted towards grade school students and broadly disseminated through conference presentations, scholarly publications, and the PI?s websites.

大小依赖？超级压电效应在nanostructuesThis赠款提供资金相结合的理论和实验研究，以了解出现的大小依赖？巨人？铁电纳米结构中的压电性。从量子力学原子计算到连续方法的建模方法将被用来理解支撑这一现象的基础科学。弯曲，人工裂纹和压痕基于实验的非均匀应变纳米结构将进行验证的预测。该计划的预期效益将是教育和社会。压电，在机械刺激下电极化的发展，从而将机械能转换为电能，具有许多应用，从简单的消费品如手机到复杂的技术进步：原子力显微镜，声纳和人造肌肉等。因此，预期的研究成果是下一代传感器和执行器，能量收集，同时表现出大的运动和力量的人造肌肉，以及对如何设计多功能的增强理解。教育的影响是，本科生和研究生将在新兴的和跨学科的研究，福尔斯落在材料科学，力学和物理学的交叉点培训。该补助金特别强调高中生和大学生，特别是女学者的研究经验。研究结果将纳入课程，专门针对小学生的模块，并通过会议演示，学术出版物和PI广泛传播？的网站。