MRI: Development of a Time Correlated Spectrometer for Simultaneous Bulk-Interfacial Dynamics Analysis

本研究将开发一种基于时间相关光谱仪的新型仪器，用于同时进行体-界面动力学分析。该仪器同时允许对衬底和体相区域之间的界面进行询问，并确定体相区域内的动力学。该仪器是基于固有的敏感时间分辨荧光技术的原理和能力，结合二阶非线性光学（NLO）光谱方法（二次谐波产生，SHG和振动和频率产生，VSFG）。后一种技术继续推进对界面现象的理解；然而，仍然对重要的体相动力学视而不见。界面动力学和体相动力学之间的关系对于理解聚合物膜层固化和粘附等现象至关重要。这种新仪器利用NLO方法使用的光学和检测组件，采用增强设计，使用非常敏感和强大的时间分辨荧光技术直接探测体相动力学。在最终的仪器设计中使用SHG或VSFG，并使用荧光探针信号同时监测界面和体相动力学，不仅可以促进对界面上分子功能相互作用的更好理解，还可以促进对体相动力学影响这些相互作用的机制的更好理解。随着这台新仪器的开发，其功能将被应用于解决从聚合物薄膜的科学和工程到纳米颗粒涂层分析和表征等问题。这台新仪器将促进跨学科研究合作，将sdsm&&t在材料科学、有机化学、环境与大气化学和工程方面的优势结合起来。新的仪器设计将提供来自许多不同的sdsm & &；T部门以及该地区的大学的参与；因此，增加SDSM&amp；T的教育机会。光学列车和检测设计将为包括科学、电气工程和机械工程部门的跨学科参与提供一个平台。增强的能力将为SDSM&amp；T和该地区大学的化学，生物，环境和材料科学课程的学生提供一个新的工具，以进一步提高知识并加速一系列科学和工程学科的进步。也存在着显著加强来自代表性不足群体的学生参与的机会。

This research will develop new instrumentation based on a time-correlated spectrometer for simultaneous bulk-interfacial dynamics analysis. The instrument simultaneously allows for interrogation of the interface between substrate and a bulk phase region, and the determination of the dynamics within the bulk phase region. This new instrument is based on principles and capabilities of inherent in the sensitive time-resolved fluorescence technique combined with the second order nonlinear optical (NLO) spectroscopy methods (second harmonic generation, SHG, and the vibrational sum-frequency generation, VSFG). The latter techniques continue to advance the understanding of interfacial phenomena; yet, remains blind to important bulk phase dynamics. The correlation between interfacial and bulk phase dynamics is critical to the understanding of such phenomena as polymeric film layer curing and adhesion. This new instrument leverages optical and detection components used with the NLO methods, with an enhanced design to directly probe bulk phase dynamics using a very sensitive and powerful time-resolved fluorescence technique. Using both, the SHG or the VSFG in a final apparatus design, and fluorescence probe signal to simultaneously monitor both interfacial and bulk phase dynamics will promote greater understanding, not only of the interactions of the molecular functionalities at interfaces, but the mechanism through which bulk phase dynamics influence those interactions. The capabilities, realized with the development of this new instrument, will be applied to address problems ranging from the science and engineering of polymeric films to the coating analysis and characterization as applied to the nanoparticles. The interdisciplinary research collaborations that will be facilitated by this new instrument combine the strengths of SDSM&T in material science, organic chemistry, environmental and atmospheric chemistry and engineering. The new instrument design will afford participation from many different SDSM&T departments, as well as, universities in the region; and therefore, enhance the educational opportunities at SDSM&T. Optical train and detection design will provide a platform for including interdisciplinary participation from the science, electrical engineering and mechanical engineering departments. The enhanced capabilities will give students, at SDSM&T and universities in the region, in chemistry, biology, environmental and material sciences programs a new tool to further advance the knowledge and accelerate the progress in a range of science and engineering disciplines. Opportunities for significant enhancement of participation of students from underrepresented groups also exist.