The Effect of Surfaces on the Strength of Nanoscale Silicon Structures

表面对纳米硅结构强度的影响

• 批准号: 0856488
• 负责人: Alan Zehnder
• 金额: $ 29.55万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0856488&HistoricalAwards=false
• 关键词: Effect; Surfaces; Strength; Nanoscale; Silicon

The Effect of Surfaces on the Strength of Nanoscale StructuresThis collaboration between an engineering and a chemistry laboratory will develop an understanding of fracture at the atomic scale using a newly developed technique capable of accurately measuring the strength of tiny (nanoscale) samples of material. Previous research by the collaborators has shown that a single layer of molecules can significantly improve the strength of nanoscale silicon beams, whereas atomic-scale roughness can lead to strength degradation. A combination of experiments and computer simulations will be used to understand the origins of these effects. This understanding will enable the development of chemical coatings and processes for the production of very strong and very stable nanometer-scale mechanical devices.By integrating research and education, this interdisciplinary project will educate undergraduate and graduate students in an area of increasing technological and economic importance the production of high strength, long-life micro- and nano-electromechanical devices (MEMS and NEMS) and will prepare these students for subsequent careers in education, industry and public service. The project will contribute to the advancement of technology by developing new commercially-viable processes. To attract more students to careers in science and technology, particularly students from traditionally underrepresented groups, members of the research team will participate in a variety of educational outreach activities to K-12 students and teachers. In addition to new activities, the researchers will continue their involvement with the Cornell Institute for Chemistry Teachers and Project High Jump two programs designed to improve high school education.

表面对纳米尺度结构强度的影响工程实验室和化学实验室之间的这项合作将使用能够准确测量微小（纳米级）材料样本强度的新开发技术来加深对原子尺度断裂的理解。合作者先前的研究表明，单层分子可以显着提高纳米级硅束的强度，而原子级粗糙度可能导致强度下降。实验和计算机模拟的结合将被用来理解这些效应的起源。这种理解将使化学涂料和工艺的发展，用于生产非常强大和非常稳定的纳米级机械设备。通过整合研究和教育，这个跨学科的项目将教育本科生和研究生在一个日益增加的技术和经济重要性的领域，生产高强度，长寿命微型和纳米机电设备（MEMS和NEMS），并将为这些学生随后的教育、工业和公共服务职业做好准备。该项目将通过开发新的商业上可行的工艺来促进技术进步。为了吸引更多的学生从事科学和技术职业，特别是来自传统上代表性不足的群体的学生，研究小组的成员将参加各种教育推广活动，以K-12学生和教师。除了新的活动外，研究人员还将继续参与康奈尔大学化学教师研究所和跳高项目这两个旨在改善高中教育的项目。