Atomic Structure and Reactivity of Ferroelectric Surfaces: the Effect of Polarization at the Surface

铁电表面的原子结构和反应性：表面极化的影响

• 批准号: 0805174
• 负责人: Dawn Bonnell
• 金额: $ 30万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0805174&HistoricalAwards=false
• 关键词: Atomic; Structure; Reactivity; Ferroelectric; Surfaces

NON-TECHNICAL DESCRIPTION: The family of compounds that exhibit ferroelectric properties contains exciting materials that are enabling current and future generation wireless communications, information storage in consumer electronics, etc. This class of materials is inspiring exciting new strategies for catalysis, hybrid sensors, and as the basis of novel nanofabrication routes. Recent results have shown that the reactivity of these surfaces depends upon the orientation ferroelectric domains. Exploiting this and the future potential of ferroelectric materials requires that the atomic interactions at ferroelectric surfaces be understood. This project is using atomic-resolution probes to study molecular interactions at ferroelectric surfaces. In conjunction with this, a study of on gender equity in engineering is being undertaken.TECHNICAL DETAILS: This program uses advanced scanning probe microscopy in conjunction with surface scattering and spectroscopic tools to determine the origin of surface structures on non-metallic perovskite oxides, specifically ferroelectrics, and the effect of local polarization on surface behavior. The interplay of atomic polarization and surface structure/reactivity is becoming critical in electronic devices such as those enabling wireless communications as components become smaller. It has recently been shown that ferroelectric domains exhibit domain specific surface reactivity. This has led to new concepts for nanofabrication, catalysis, and electronic devices. In order to develop a fundamental understanding of domain specific behavior, the structures of BaTiO3 (100) surfaces will be determined and the effect of domain orientation on adsorption will be quantified. In addition to training students on advanced atomic imaging in the context of important technological materials, a study on gender equity in engineering is being carried out.

非技术描述：表现出铁电特性的化合物家族包含令人兴奋的材料，这些材料能够实现当前和未来的无线通信，消费电子中的信息存储等。这类材料激发了令人兴奋的催化新策略，混合传感器，以及作为新型纳米制造途径的基础。 最近的结果表明，这些表面的反应性取决于方向的铁电域。 利用铁电材料的未来潜力，要求了解铁电表面的原子相互作用。 该项目正在使用原子分辨率探针研究铁电表面的分子相互作用。 结合使用，正在进行对工程性别平等的研究。技术详细信息：该程序与表面散射和光谱工具结合使用高级扫描探针显微镜，以确定非金属钙岩氧化物表面结构的起源，具体来说是铁电电子的非金属钙岩氧化物，具体是局部极限化的效果。 在电子设备中，诸如启用无线通信的电子设备的相互作用和表面结构/反应性的相互作用变得至关重要。 最近已经显示，铁电域表现出特异性的表面反应性。这导致了用于纳米制作，催化和电子设备的新概念。 为了发展对域特定行为的基本理解，将确定Batio3（100）表面的结构，并将量化域取向对吸附的影响。除了在重要技术材料的背景下培训学生先进的原子成像外，还在进行了工程中的性别平等研究。