Standoff reflection-absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers

Xunchen Liu; Charles W. Van Neste; Manisha Gupta; Ying Y. Tsui; Seonghwan Kim; Thomas Thundat

doi:10.1016/j.snb.2013.10.026

Standoff reflection-absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers

Xunchen Liu
, Charles W. Van Neste
, Manisha Gupta
, Ying Y. Tsui
, Seonghwan Kim
, Thomas Thundat

Department of Chemical and Biological Engineering

University of Alberta
University of Calgary

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

38 Scopus citations

Abstract

We demonstrate a standoff detection scheme of surface adsorbed explosives based on the broadband quantum cascade laser (QCL) infrared reflection- absorption spectroscopy and ultraviolet laser photodecomposition. We utilized a sub-second rapid-scan data acquisition scheme to record continuously scanned spectra which revealed the broad-band absorption features of surface adsorbed explosive molecules such as cyclotrimethylene trinitramine (RDX) and trinitrotoluene with a surface concentration of 1 μg/cm². The standoff QCL spectra perfectly reproduce the reflectance spectra obtained with a conventional Fourier transform infrared spectroscopy instrument. The conformation conversion of RDX molecules is also observed and studied.

Original language	English
Pages (from-to)	450-456
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	191
DOIs	https://doi.org/10.1016/j.snb.2013.10.026
State	Published - 2014

Keywords

Explosive detection
Photodecomposition
Quantum cascade laser
Standoff IR spectroscopy

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10.1016/j.snb.2013.10.026

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title = "Standoff reflection-absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers",

abstract = "We demonstrate a standoff detection scheme of surface adsorbed explosives based on the broadband quantum cascade laser (QCL) infrared reflection- absorption spectroscopy and ultraviolet laser photodecomposition. We utilized a sub-second rapid-scan data acquisition scheme to record continuously scanned spectra which revealed the broad-band absorption features of surface adsorbed explosive molecules such as cyclotrimethylene trinitramine (RDX) and trinitrotoluene with a surface concentration of 1 μg/cm2. The standoff QCL spectra perfectly reproduce the reflectance spectra obtained with a conventional Fourier transform infrared spectroscopy instrument. The conformation conversion of RDX molecules is also observed and studied.",

keywords = "Explosive detection, Photodecomposition, Quantum cascade laser, Standoff IR spectroscopy",

author = "Xunchen Liu and \{Van Neste\}, \{Charles W.\} and Manisha Gupta and Tsui, \{Ying Y.\} and Seonghwan Kim and Thomas Thundat",

year = "2014",

doi = "10.1016/j.snb.2013.10.026",

language = "English",

volume = "191",

pages = "450--456",

journal = "Sensors and Actuators, B: Chemical",

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T1 - Standoff reflection-absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers

AU - Liu, Xunchen

AU - Van Neste, Charles W.

AU - Gupta, Manisha

AU - Tsui, Ying Y.

AU - Kim, Seonghwan

AU - Thundat, Thomas

PY - 2014

Y1 - 2014

N2 - We demonstrate a standoff detection scheme of surface adsorbed explosives based on the broadband quantum cascade laser (QCL) infrared reflection- absorption spectroscopy and ultraviolet laser photodecomposition. We utilized a sub-second rapid-scan data acquisition scheme to record continuously scanned spectra which revealed the broad-band absorption features of surface adsorbed explosive molecules such as cyclotrimethylene trinitramine (RDX) and trinitrotoluene with a surface concentration of 1 μg/cm2. The standoff QCL spectra perfectly reproduce the reflectance spectra obtained with a conventional Fourier transform infrared spectroscopy instrument. The conformation conversion of RDX molecules is also observed and studied.

AB - We demonstrate a standoff detection scheme of surface adsorbed explosives based on the broadband quantum cascade laser (QCL) infrared reflection- absorption spectroscopy and ultraviolet laser photodecomposition. We utilized a sub-second rapid-scan data acquisition scheme to record continuously scanned spectra which revealed the broad-band absorption features of surface adsorbed explosive molecules such as cyclotrimethylene trinitramine (RDX) and trinitrotoluene with a surface concentration of 1 μg/cm2. The standoff QCL spectra perfectly reproduce the reflectance spectra obtained with a conventional Fourier transform infrared spectroscopy instrument. The conformation conversion of RDX molecules is also observed and studied.

KW - Explosive detection

KW - Photodecomposition

KW - Quantum cascade laser

KW - Standoff IR spectroscopy

UR - https://www.scopus.com/pages/publications/84887288008

U2 - 10.1016/j.snb.2013.10.026

DO - 10.1016/j.snb.2013.10.026

M3 - Article

AN - SCOPUS:84887288008

SN - 0925-4005

VL - 191

SP - 450

EP - 456

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

Standoff reflection-absorption spectra of surface adsorbed explosives measured with pulsed quantum cascade lasers

Abstract

Keywords

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