Sum Frequency Generation Imaging of Patterns on Surfaces

表面图案的和频生成成像

• 批准号: 0650779
• 负责人: Steven Baldelli
• 金额: $ 37.41万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0650779&HistoricalAwards=false
• 关键词: Sum; Frequency; Generation; Imaging; Patterns

The Analytical and Surface Chemistry (ASC) program of the Division of Chemistry will support the research program of Prof. Steven Baldelli of the University of Houston. Prof. Baldelli's' research program focuses on the development of sum frequency generation (SFG) microscopy with the capability to investigate chemically patterned surfaces at the molecular level based on the vibrational spectroscopy of the adsorbates. SFG is surface sensitive technique that has been used previously to obtain the structure and orientation of molecules when adsorbed to surfaces. Dr. Baldelli and his students will convert this spectroscopic method to a powerful imaging tool characterized with 20 psec temporal resolution and 1 micron spatial resolution. This will enable the group to obtain a detailed chemical map of the surface with information on adsorbate bonding, local electric fields, chemical reactivity, and speciation across the surface. Samples such as polymers, thin films and coatings could be analyzed in great detail using SFG microscopy. It will also be possible to obtain molecular information from biological samples like cell surfaces and tissues. The study will provide an excellent educational opportunity for trainees desiring work at the interface of chemistry and material science.

化学系的分析和表面化学(ASC)计划将支持休斯顿大学Steven Baldelli教授的研究计划。Baldelli教授的研究计划集中在和频(SFG)显微镜的开发上，该显微镜能够基于吸附物的振动光谱在分子水平上研究化学图案化表面。SFG是一种表面敏感技术，以前曾被用来在吸附到表面时获得分子的结构和取向。Baldelli博士和他的学生将把这种光谱方法转化为一种强大的成像工具，其特点是具有20PSEC的时间分辨率和1微米的空间分辨率。这将使该小组能够获得表面的详细化学图谱，以及关于表面上的吸附键合、局部电场、化学反应活性和物种形成的信息。利用SFG显微镜可以对聚合物、薄膜和涂层等样品进行非常详细的分析。从细胞表面和组织等生物样本中获取分子信息也将成为可能。这项研究将为希望在化学和材料科学领域工作的学员提供一个极好的教育机会。