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Issue 8, 2011
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An integrated portable Raman sensor with nanofabricated gold bowtie array substrates for energetics detection

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Abstract

An integrated field-portable surface enhanced 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−1 (or ∼6.6 µM) and 0.20 mg L−1 (∼0.9 µM), 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.

Graphical abstract: An integrated portable Raman sensor with nanofabricated gold bowtie array substrates for energetics detection

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Publication details

The article was received on 07 Dec 2010, accepted on 07 Feb 2011 and first published on 04 Mar 2011


Article type: Paper
DOI: 10.1039/C0AN00982B
Citation: Analyst, 2011,136, 1697-1702
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    An integrated portable Raman sensor with nanofabricated gold bowtie array substrates for energetics detection

    N. A. Hatab, C. M. Rouleau, S. T. Retterer, G. Eres, P. B. Hatzinger and B. Gu, Analyst, 2011, 136, 1697
    DOI: 10.1039/C0AN00982B

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