CAREER: Controlled Processing of Self-Assembly in Single Crystal Oxide Films

职业：单晶氧化物薄膜中自组装的受控处理

• 批准号: 1749440
• 负责人: Alp Sehirlioglu
• 金额: $ 50万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1749440&HistoricalAwards=false
• 关键词: CAREER; Controlled; Processing; Self; Assembly

For a number of materials systems, the properties at the interfaces are critical to performance. Nanostructured materials for low power electronic materials, logic devices, and megnetoelectrics, which are used as sensors and local energy harvesters, offer the potential for low-cost, high-performance materials and devices. These materials and devices have numerous applications, including national security and defense. To better understand how to engineer these materials, this Faculty Early Career Development Program (CAREER) Award supports research to understand and control the building blocks for nanostructured functional materials. This research seeks to reveal the mechanisms controlling atomic-scale ordering and local transport mechanisms, and developing the means to tune them. Both the research and education components of this work will make symmetry in the atomic world visible - through outreach programs engaging elementary school teachers, the researchers will introduce concepts of atomic symmetry though interactive visualization activities using holography.The origin of the self-assembly in single crystal nanoscale oxides is a subject of debate and has been attributed to both compositional and structural variations, mainly octahedral distortions. In this work, single crystal oxides which undergo self-assembly to form a superstructure in a checkerboard pattern of nanometer-sized domains are investigated to elucidate the mechanisms of self-assembly. Epitaxial growth of these materials with various mechanical boundary conditions provides control over the superstructure and thus the properties. Unique parameters that are not available in bulk processing allow understanding of the fundamentals of transport mechanisms, and also allow tuning and isolation of different types of conduction, leading to metastable structures, and revealing lower-dimensional conduction paths.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

对于许多材料系统，界面上的属性对于性能至关重要。低功率电子材料，逻辑设备和Megnetoelectrics的纳米结构材料（被用作传感器和当地能量收割机）为低成本，高性能的材料和设备提供了潜力。这些材料和设备有许多申请，包括国家安全和国防。 为了更好地了解如何设计这些材料，这项教师早期职业发展计划（职业）奖支持研究和控制纳米结构功能材料的构件。这项研究旨在揭示控制原子级订购和当地运输机制的机制，并开发调整它们的手段。这项工作的研究和教育组成部分都将使原子世界中的对称性可见 - 通过吸引小学教师的外展计划，研究人员将介绍原子对称性的概念，尽管使用全息图进行了交互式可视化活动。单层纳米氧化物中自组装的起源是单层纳米氧化物中的依据和分别是构成的差异，并且是属于构图的差异。在这项工作中，研究了在纳米尺寸域的棋盘格模式中进行自组装以形成上部结构的单晶氧化物，以阐明自组装的机制。这些材料的外延生长具有各种机械边界条件，可控制上层建筑，从而控制性质。 Unique parameters that are not available in bulk processing allow understanding of the fundamentals of transport mechanisms, and also allow tuning and isolation of different types of conduction, leading to metastable structures, and revealing lower-dimensional conduction paths.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.