CAREER: Dynamics of Self-Assembly at Strained Metal Interfaces

职业：应变金属界面自组装动力学

• 批准号: 0134933
• 负责人: Karsten Pohl
• 金额: $ 45万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0134933&HistoricalAwards=false
• 关键词: CAREER; Dynamics; Self; Assembly; Strained

This CAREER award will fund a project whose goal is the development of a better understanding of the fundamental mechanism of self-organizing behavior at surfaces and the significance of interfacial stress, through direct dynamic measurements of the driving forces of self-assembly using scanning tunneling microscopy (STM). Two-dimensional nano-arrays in thermal equilibrium of large-scale order and size uniformity will be grown on strained interfaces between a bimetallic atomic layer and a dissimilar substrate in ultrahigh vacuum. Combining the structural information (from unique real-time variable-temperature STM measurements) with quantum-size effects in the electronic structure (from high-resolution UV photoemission) will guide the development of new dynamic models to describe the evolution and properties of nanoscale structures on surfaces. This research will form an integral part of the proposed educational outreach program. The newly designed course entitled "Modern Aspects of Materials Physics for High School Teachers" and the proposed "Summer Materials Science Institute for High School Students" will address the need to improve the science achievement for students by enriching science teaching in the high school classroom. In addition the graduate and undergraduate students involved in this research will receive training in state of the art techniques, providing them with a sound basis for their future scientific careers.Spontaneous formation of organized nanoscale structures on surfaces has been observed in many systems. They are thought to arise because of a delicate balance between long-range strain field interactions and short-range chemical forces that stabilizes these structures. A detailed understanding of the driving forces, however, does not exist. The goal of this CAREER project is to identify and control these interactions that have the potential to surpass standard patterning technologies and thus, to lead the way to higher density magnetic storage, more selective catalytic materials, higher sensitivity chemical sensors, and perhaps, quantum computers. Unique real-time measurements of the dynamics of individual atoms self-ordering into nano-arrays will be performed on a home-built (scanning tunneling) microscope. The results will guide the development of new dynamic models to describe the evolution of nanoscale structures on surfaces. This research will form an integral part of the proposed educational outreach program. The newly designed course entitled "Modern Aspects of Materials Physics for High School Teachers" and the proposed "Summer Materials Science Institute for High School Students" will address the need to improve the science achievement for students by enriching science teaching in the high school classroom. In addition the graduate and undergraduate students involved in this research will receive training in state of the art techniques, providing them with a sound basis for their future scientific careers.

该职业奖将资助一个项目，该项目的目标是通过使用扫描隧道显微镜 (STM) 直接动态测量自组装驱动力，更好地理解表面自组织行为的基本机制以及界面应力的重要性。处于大规模有序和尺寸均匀性热平衡的二维纳米阵列将在超高真空中的双金属原子层和异种衬底之间的应变界面上生长。将结构信息（来自独特的实时变温 STM 测量）与电子结构中的量子尺寸效应（来自高分辨率紫外光电发射）相结合，将指导新动态模型的开发，以描述表面纳米级结构的演化和特性。这项研究将构成拟议的教育推广计划的一个组成部分。新设计的课程题为“高中教师材料物理的现代方面”和拟议的“高中生夏季材料科学研究所”将满足通过丰富高中课堂科学教学来提高学生科学成绩的需求。 此外，参与这项研究的研究生和本科生将接受最先进技术的培训，为他们未来的科学生涯奠定坚实的基础。在许多系统中都观察到表面有组织的纳米级结构的自发形成。人们认为它们的出现是由于长程应变场相互作用和稳定这些结构的短程化学力之间的微妙平衡。然而，对驱动力的详细了解并不存在。这个职业项目的目标是识别和控制这些有可能超越标准图案技术的相互作用，从而引领更高密度的磁存储、更具选择性的催化材料、更高灵敏度的化学传感器，甚至量子计算机。将在自制（扫描隧道）显微镜上对单个原子自排序成纳米阵列的动力学进行独特的实时测量。研究结果将指导新动态模型的开发，以描述表面纳米级结构的演化。这项研究将构成拟议的教育推广计划的一个组成部分。新设计的课程题为“高中教师材料物理的现代方面”和拟议的“高中生夏季材料科学研究所”将满足通过丰富高中课堂科学教学来提高学生科学成绩的需求。 此外，参与这项研究的研究生和本科生将接受最先进技术的培训，为他们未来的科学职业生涯打下坚实的基础。