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

这项研究将开发基于时间相关光谱仪的新仪器，用于同时进行体相界面动力学分析。该仪器同时允许询问衬底和大块相区之间的界面，并确定大块相区内的动力学。这种新仪器的原理和功能是基于灵敏的时间分辨荧光技术所固有的原理和能力，并结合了二阶非线性光学(NLO)光谱方法(二次谐波产生和振动和频率产生，VSFG)。后一种技术继续推进了对界面现象的理解；然而，对重要的体相动力学仍然视而不见。界面相动力学和本体相动力学之间的关联对于理解聚合物薄膜层固化和粘结等现象是至关重要的。这一新仪器利用了与NLO方法一起使用的光学和检测组件，并采用了增强的设计，使用非常灵敏和强大的时间分辨荧光技术直接探测整体相动力学。在最终的仪器设计中使用SHG或VSFG和荧光探针信号来同时监测界面和体相动力学，将有助于更好地理解界面上分子官能团的相互作用，以及体相动力学影响这些相互作用的机制。随着这一新仪器的开发，这些能力将被应用于解决从聚合物薄膜的科学和工程到应用于纳米颗粒的涂层分析和表征等一系列问题。这一新仪器将促进跨学科研究合作，将SDSM&And；T在材料科学、有机化学、环境和大气化学以及工程方面的优势结合在一起。新的仪器设计将让许多不同的SDSM和技术部门以及该地区的大学参与进来；因此，增加了SDSM和T的教育机会。光学培训和检测设计将提供一个平台，让科学、电气工程和机械工程系参与其中。增强的能力将为SDSM&amp；T；和该地区的大学的化学、生物、环境和材料科学项目的学生提供一个新的工具，进一步提高知识，加快一系列科学和工程学科的进步。也有机会大大加强来自代表性不足群体的学生的参与。

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.