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

本研究将开发新的仪器的基础上的时间相关光谱仪，同时体-界面动力学分析。 该仪器同时允许询问基板和体相区域之间的界面，并确定体相区域内的动态。这种新仪器是基于灵敏的时间分辨荧光技术与二阶非线性光学（NLO）光谱方法（二次谐波产生，SHG，和振动和频产生，VSFG）相结合的原理和能力。后者的技术继续推进界面现象的理解，但仍然盲目的重要体相动力学。界面和体相动力学之间的相关性对于理解聚合物膜层固化和粘附等现象至关重要。这款新仪器利用了与NLO方法一起使用的光学和检测组件，具有增强的设计，可以使用非常灵敏和强大的时间分辨荧光技术直接探测体相动态。在最终的装置设计中使用SHG或VSFG以及荧光探针信号来同时监测界面和体相动力学将促进更好的理解，不仅是界面处的分子官能团的相互作用，而且是体相动力学影响这些相互作用的机制。随着这种新仪器的开发而实现的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的问题。这一新仪器将促进跨学科的研究合作，联合收割机了SDSM T在材料科学、有机化学、环境和大气化学与工程方面的优势。新的仪器设计将提供来自许多不同的SDSM T部门以及该地区大学的参与;因此，增加了SDSM T的教育机会。光学列车和检测设计将提供一个平台，包括科学，电气工程和机械工程部门的跨学科参与。增强的能力将为SDSM 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种新的工具，以进一步推进知识并加速一系列科学和工程学科的进展。 也存在着显著提高代表性不足群体学生参与的机会。

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.