Detection and Analysis of Cyclotrimethylenetrinitramine (RDX) in Environmental Samples by Surface-Enhanced Raman Spectroscopy
OAK RIDGE NATIONAL LAB TN ENVIRONMENTAL SCIENCES DIV
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Techniques for rapid and sensitive detection of energetics such as cyclotrimethylenetrinitramine RDX are needed both for environmental and security screening applications. Here we report the use of surface-enhanced Raman scattering SERSspectroscopy to detect traces of RDX with good sensitivity and reproducibility. Using gold Au nanoparticles as SERS substrates, RDX was detectable at concentrations as low as 0.15mgl in a contaminated groundwater sample. This detection limit is about two orders of magnitude lower than those reported previously using SERS techniques. A surface enhancement factor was obtained. This research further demonstrates the potential for using SERS as a rapid, in situ field screening tool for energetics detection when coupled with a portable Raman spectrometer.
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