复杂形貌下表面应力机理研究及其在新型微悬臂梁传感器中的应用

项目名称： 复杂形貌下表面应力机理研究及其在新型微悬臂梁传感器中的应用

项目编号： No.10872003

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 机械、仪表工业

项目作者： 段慧玲

作者单位： 北京大学

项目金额： 42万元

中文摘要： 本项目建立了复杂形貌的表面应力理论。然后，作为实验验证和应用，分别把微纳米介孔材料和具有纳米尺度粗糙表面的薄膜材料用于微悬臂梁传感器上，由此可发展两类新型微悬臂梁传感器。另外，研制了新型纳米孔隙材料并对其浸润和输运性能进行了研究。在新型微悬臂梁传感器的力学机制研究及量子点的力学和物理性能分析方面取得了重要突破。在本项目执行期间，在PNAS, JMPS, PRB, Acta Materialia 等国际著名学术期刊发表SCI论文17篇，其中，2篇论文成为热点论文。在IUTAM Symposium、国内外学术会议和大学做邀请学术报告二十多次。获得四项学术奖励，包括：第十二届中国力学学会青年科技奖 (2011)；茅以升科学技术奖北京青年科技奖（2009）；德国洪堡基金会资助校友研究组联合基金以及美国机械工程师学会(ASME) The Sia Nemat- Nasser 奖（2009年度唯一获奖者）。本项目的研究对于揭示复杂表面形貌下由吸附导致的表面应力变化的物理机制、纳米材料的功能化和设计、以及高灵敏度微悬臂梁传感器的研制将具有重要的意义。

中文关键词： 表面应力；复杂表面；吸附；微悬臂梁传感器；静;动态特性

英文摘要： In this project, we first established a theory of surface stress for complex surface topography. Then, as the experimental verifications and applications, we used both the micro/nano-porous materials and the film with nanoscale roughness for micro-cantilever sensors, which lead to two novel kinds of micro-cantilever sensors. In addition, we fabricated novel nano-porous materials and studied on the wetting and transport properties of these kinds of materials. We have made a significant breakthrough in the studies on the mechanical mechanism of novel micro-cantilever sensors and the analyses of the mechanical and physical properties of quantum dot. During the execution period of this project, we have published 17 SCI papers in PNAS, JMPS, PRB, Acta Materialia and other international academic journals,including 2 hot papers. The applicant has made invited talks more than twenty times in IUTAM Symposium, domestic and international academic conferences and universities. The applicant has obtained four academic awards, including the 12th Science and Technology Award to young scholars of the Chinese Society of Theoretical and Applied Mechanics (2011), Mao Yisheng Award for Science and Technology to young scholars of Beijing (2009), Research Group Linkage Programme from Germany Humboldt foundation, and the Sia Nemat-Nasser award from the American Society of Mechanical Engineers (ASME) (the only awardee in 2009). The research results of this project will have important significances in revealing the physical mechanism of the surface stress due to adsorption on complex surface topography, the functionalization and design of the nano-materials, and fabrication for the micro-cantilever sensors with high sensitivity.

英文关键词： surface stress; complex surface; absorption; microcantilever sensor; static and dynamic properties