Structures and Properties of Monolayer Phases

单层相的结构和性能

• 批准号: 0079311
• 负责人: Charles Knobler
• 金额: $ 54.7万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079311&HistoricalAwards=false
• 关键词: Structures; Properties; Monolayer; Phases

Professor Charles Knobler of the University of California Los Angeles is supported by the Theoretical and Computational Chemistry program to perform experimental and theoretical studies on phase behaviors of organic monolayers on water. Using monolayers and methods including Brewster-angle microscopy, grazing incidence x-ray diffraction and scanning force microscopy, the PI proposes to study the molecular origins of sliding friction and also the kinetics of phase transitions. The collapse of monolayers into three dimensional structures will also be investigated. The work is collaborative with the Applied Mathematics department at UCLA and with international groups including two at Saclay, France and MPI, Golm, Germany. Monolayers serve as model systems for the more complicated biological membranes, and also allow one to study phase transformations in two dimensions, which is a tractable problem from a theoretical standpoint. The measurements will have bearing on similar phenomena in liquid crystals, adsorbed atoms on surfaces, liquid crystalline polymers and antiferromagnets. There are applications of this work to problems in lubrication and sensors.

加州大学洛杉矶分校的Charles Knobler教授在理论和计算化学项目的支持下，对水中有机单层的相行为进行了实验和理论研究。利用单层材料和包括布鲁斯特角显微镜、掠入射x射线衍射和扫描力显微镜在内的方法，研究滑动摩擦的分子起源和相变动力学。单分子层坍塌成三维结构也将被研究。这项工作是与加州大学洛杉矶分校的应用数学系以及包括法国萨克莱和德国戈姆的MPI在内的两个国际小组合作进行的。单分子膜作为更复杂的生物膜的模型系统，也允许人们研究二维的相变，从理论的角度来看，这是一个容易处理的问题。这些测量结果将对液晶、表面吸附原子、液晶聚合物和反铁磁体中的类似现象产生影响。这项工作在润滑和传感器问题上有应用。