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QUANTUM OPTICS/ AMO PHYSICS SEMINAR


"Ultrasensitive Detection of Contaminants in Water Using Deep-UV Raman Spectroscopy"


Vladislav Yakovlev
Department of Biomedical Engineering
Texas A&M University


ABSTRACT 

Raman spectroscopy is a simple analytical tool, which allows in situ recognition and quantitative concentration measurements of molecular species. In principle, it allows simultaneous trace analysis of multiple chemical species in water. The greatest disadvantage of Raman spectroscopy is its extremely low level of signal, which makes analysis of low-concentrated molecular species problematic. Deep-UV Raman spectroscopy is one of the ways to substantially increase the strength of Raman signal, making it possible to analyze potentially hazardous molecules in solution at micromolar-level concentrations. By combining deep-UV excitation with non-plasmonic, non-absorbing signal enhancing sensor, we have achieved real-time detection of nanomolar-level concentrations. In my talk I will describe the new sensor architecture, will demonstrate our results on detecting several compounds, which are identified by the Environmental Protection Agency as potentially hazardous, and will describe our recent advances on the deep-UV Raman spectroscopy instrumentation development.


Tuesday, March 6, 2012
IQSE 578, 11:30 a.m.
Mitchell Physics Building


Institute for Quantum Science and Engineering
Texas A&M University

(Coffee and Cookies to be served 11:15 a.m.)