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

Nahla A. Hatab; C. M. Rouleau; Scott T. Retterer; Gyula Eres; Paul B. Hatzinger; Baohua Gu

doi:10.1039/c0an00982b

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

Nahla A. Hatab, C. M. Rouleau, Scott T. Retterer, Gyula Eres, Paul B. Hatzinger, Baohua Gu

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

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 M) and 0.20 mg L^-1 (∼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.

Original language	English
Pages (from-to)	1697-1702
Number of pages	6
Journal	Analyst
Volume	136
Issue number	8
DOIs	https://doi.org/10.1039/c0an00982b
State	Published - Apr 21 2011

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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 M) and 0.20 mg L-1 (∼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.",

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AU - Hatab, Nahla A.

AU - Rouleau, C. M.

AU - Retterer, Scott T.

AU - Eres, Gyula

AU - Hatzinger, Paul B.

AU - Gu, Baohua

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

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