二维平面上混合自组装单层有序微相的结构调控和性质研究

项目名称： 二维平面上混合自组装单层有序微相的结构调控和性质研究

项目编号： No.21473045

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 于淼

作者单位： 哈尔滨工业大学

项目金额： 84万元

中文摘要： 在二维平面上设计和可控组装纳米尺度功能性结构、调控其性能并将其排列为长程有序的宏观网络体系，具有重要的科学理论意义和实际应用价值。本项目拟采用含巯基分子的混合自组装单层，通过改变混合配体的类型、终端官能团、配比、链长和链长差、金属基底、后处理温度等相关因素，使用气相沉积与液相组装方法，精确控制贵金属表面配体组份，在分子水平上控制混合自组装单层的平衡态结构，实现类嵌段共聚物薄膜的规则微相及微相的长程有序排列，进而调节其局域导电性、电荷分布、亲疏水性、化学反应活性等物化性质和功能。同时，通过多种实验测试方法，尤其是分子尺度上高分辨的结构表征和在位化学分析，结合理论计算，深入理解混合分子自组装单层微相结构的形成机理，阐释吸附在规则的二维金属格子上各结构相的基本属性和相变规律，揭示其性质与结构之间的关系，进而优化和设计表面性质和功能，为其在纳米器件方面的实际应用奠定基础。

中文关键词： 纳米结构；分子自组装；扫面探针显微镜

英文摘要： To design and direct the self-assembly of functional nanostructures and align them into extended networks are of utmost significance and values for both fundamental science and practical applications in many fields. In the present project, we propose to assemble microphase networks of mixed self-assembled monolayers (MSAMs) with controlled morphology, long-range order, and preferred physical and chemical properties by varying the molecular types and their functional groups, chain length, chain length difference, mixing ratio, as well as the substrate and the annealing temperature. Utilizing a variety of methods including scanning tunneling microscopy, atomic force microscopy, temperature programmed desorption, X-ray photoelectron spectroscopy, Infrared spectroscopy and Raman spectroscopy, in particular the high-resolution structural characterization and in situ chemical analysis under ultra-high vacuum conditions, systematic investigations of different MSAM systems will be performed. Combining experimental studies with theoretical calculations, this work is also aimed on in-depth understanding of the formation and phase transformation mechanisms of MSAMs as well as the structure-property correlation.

英文关键词： nanostructure;molecular self-assembly;scanning tunneling microscopy