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Scanning tunneling microscopy of temperature dependent molecular processes at the solution-solid interface

溶液-固体界面处温度依赖性分子过程的扫描隧道显微镜

基本信息

批准号：
1403989
负责人：
Kerry Hipps
金额：
$ 43万
依托单位：
Washington State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-09-01 至 2018-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1403989&HistoricalAwards=false
关键词：
Scanning tunneling microscopy temperature dependent

项目摘要

Professor Kerry W. Hipps of Washington State University is supported by the Chemical Measurement and Imaging (CMI) Program in the Division of Chemistry to conduct studies using scanning tunneling microscopy on several basic temperature-dependent surface problems of fundamental and technical importance at the solid-solution interface. A variable temperature scanning tunneling microscope (STM) will be customized and used to conduct the proposed research. Processes occurring at the solid solution interface can be dramatically affected by temperature, and understanding these temperature induced processes at the molecular level will facilitate advances in several science research fields including surface chemistry, catalysis, adhesion, corrosion, photophysics, and self-assembly in industrial and biological systems. The results from this research may lead to inexpensive and efficient manufacturing methods in areas such as opto-electronic devices, solar cells and sensors.The objective of the proposed research is to customize a variable temperature instrument to mitigate the problems associated with STM imaging at elevated temperatures, such as thermal drift, temperature differences between different parts of the instrument, and solvent evaporation and condensation on the STM head and other parts of the instrument. The newly customized instrument will be employed to study several basic temperature-dependent surface problems of fundamental as well as practical importance. These include: 1) structures, formation kinetics and thermodynamics of physical adsorbates at the solution solid interface; 2) chemical reactions at the solid-solution interface; 3) phase transformations in covalently attached monolayers; and mechanisms and kinetics of chemical transformations of preformed organic adlayers. Graduate and undergraduate students will be trained in chemistry and instrument construction, two areas for which cross-training is particularly valuable. The results of this study will be incorporated in higher level courses in Chemistry and Materials Science. During the course of conducting this research, the research team will perform outreach activities through the WSU "Imagine Tomorrow" high school energy program.

华盛顿州立大学的克里·W·希普斯教授得到化学系化学测量和成像(CMI)计划的支持，利用扫描隧道显微镜对固-溶液界面上几个基本的与温度相关的表面问题进行研究，这些问题具有基本的和技术上的重要性。一台变温扫描隧道显微镜(STM)将被定制并用于进行拟议的研究。发生在固溶体界面的过程会受到温度的显著影响，在分子水平上理解这些温度诱导的过程将有助于在工业和生物系统中的表面化学、催化、附着、腐蚀、光物理和自组装等科学研究领域取得进展。这项研究的结果可能导致在光电子器件、太阳能电池和传感器等领域的廉价和高效的制造方法。拟议的研究的目标是定制一种变温仪器来缓解高温下扫描隧道显微镜成像的相关问题，如热漂移、仪器不同部分之间的温差以及扫描隧道显微镜头部和仪器其他部分的溶剂蒸发和冷凝。新定制的仪器将被用来研究几个基本的温度相关表面问题，这些问题具有基本的和实际的重要性。包括：1)溶液-固界面上物理吸附的结构、形成动力学和热力学；2)固-溶液界面上的化学反应；3)共价键合的单分子膜中的相变；以及预制有机附着层的化学转化的机理和动力学。研究生和本科生将接受化学和仪器制造方面的培训，这两个领域的交叉培训特别有价值。这项研究的结果将被纳入化学和材料科学的更高级别的课程。在进行这项研究的过程中，研究团队将通过西斯安那州立大学“想象明天”高中能源计划开展外展活动。