期刊
JOURNAL OF RAMAN SPECTROSCOPY
卷 41, 期 10, 页码 1131-1136出版社
WILEY
DOI: 10.1002/jrs.2574
关键词
RDX; explosives; SERS detection; gold nanoparticles; groundwater
类别
资金
- U.S. Department of Defense
- U.S. Department of Energy [DE-AC05-00OR22725]
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 (SERS) spectroscopy to detect traces of RDX with good sensitivity and reproducibility. Using gold (Au) nanoparticles (similar to 90-100 nm in diameter) as SERS substrates, RDX was detectable at concentrations as low as 0.15 mg/l 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 of similar to 6 x 10(4) 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. Copyright (C) 2010 John Wiley & Sons, Ltd.
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