An integrated portable Raman sensor with nanofabricated gold bowtie array substrates for energetics detection
- Oak Ridge National Laboratory (ORNL)
- ORNL
- Shaw Environmental, Inc., Lawrenceville, NJ
An integrated field-portable surface enhaned Raman scattering (SERS) sensing system has been developed and evaluated for quantitative analysis of energetics such as perchlorate (ClO4-) and trinitrotoluene (TNT) at environmentally-relevant concentrations and conditions. The detection system consists of a portable Raman spectrometer equipped with an optical fiber probe that is coupled with novel elevated gold bowtie nanostructural arrays as a sensitive and reproducible SERS substrate. Using the standard addition technique, we show that ClO4- and TNT can be quantified at concentrations as low as 0.66 mg/L (or ~6.6 M) and 0.20 mg/L (~0.9 M), respectively, in groundwater samples collected from selected military sites. This research represents the first step toward the development of a field SERS sensor which may permit rapid, in-situ screening and analysis for various applications including national security, chemical, biological and environmental detection.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- Work for Others (WFO)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1028172
- Journal Information:
- Analyst, The, Vol. 136, Issue 8; ISSN 0003-2654
- Country of Publication:
- United States
- Language:
- English
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