Development of a fieldable rugged TATP surface-enhanced Raman spectroscopy sensor

Kevin M. Spencer; Susan L. Clauson; James M. Sylvia

doi:10.1117/12.884044

12 May 2011 Development of a fieldable rugged TATP surface-enhanced Raman spectroscopy sensor

Kevin M. Spencer, Susan L. Clauson, James M. Sylvia

Proceedings Volume 8032, Next-Generation Spectroscopic Technologies IV; 80320L (2011) https://doi.org/10.1117/12.884044
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Surface-enhanced Raman spectroscopy (SERS) has repeatedly been shown to be capable of single molecule detection in laboratory controlled environments. However, superior detection of desired compounds in complex situations requires optimization of factors in addition to sensitivity. For example, SERS sensors are metals with surface roughness in the nm scale. This metallic roughness scale may not adsorb the analyte of interest but instead cause a catalytic reaction unless stabilization is designed into the sensor interface. In addition, the SERS sensor needs to be engineered sensitive only to the desired analyte(s) or a small subset of analytes; detection of every analyte would saturate the sensor and make data interpretation untenable. Finally, the SERS sensor has to be a preferable adsorption site in passive sampling applications, whether vapor or liquid. In this paper, EIC Laboratories will discuss modifications to SERS sensors that increase the likelihood of detection of the analyte of interest. We will then demonstrate data collected for TATP, a compound that rapidly decomposes and is undetected on standard silver SERS sensors. With the modified SERS sensor, ROC curves for room temperature TATP vapor detection, detection of TATP in a non equilibrium vapor environment in 30 s, detection of TATP on a sensor exposed to a ventilation duct, and detection of TATP in the presence of fuel components were all created and will be presented herein.

Citation Download Citation

Kevin M. Spencer, Susan L. Clauson, and James M. Sylvia "Development of a fieldable rugged TATP surface-enhanced Raman spectroscopy sensor", Proc. SPIE 8032, Next-Generation Spectroscopic Technologies IV, 80320L (12 May 2011); https://doi.org/10.1117/12.884044

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