Nitroaromatic explosive vapor detection using a digitally printed sensor array (Conference Presentation)

Carsten Eschenbaum; Nico Bolse; Ralph Eckstein; Tobias Rödlmeier; Anne Habermehl; Gerardo Hernandez-Sosa; Ulrich Lemmer

doi:10.1117/12.2274239

19 September 2017 Nitroaromatic explosive vapor detection using a digitally printed sensor array (Conference Presentation)

Carsten Eschenbaum, Nico Bolse, Ralph Eckstein, Tobias Rödlmeier, Anne Habermehl, Gerardo Hernandez-Sosa, Ulrich Lemmer

Author Affiliations +

Proceedings Volume 10364, Organic Sensors and Bioelectronics X; 103640C (2017) https://doi.org/10.1117/12.2274239
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States

Abstract

We report on a fluorescent optoelectronic nose for the trace detection of nitroaromatic explosive vapors. The sensor arrays, fabricated by aerosol-jet printing, consist of six different polymers as transducers. We demonstrate the nose’s ability to discriminate between several nitroaromatics including nitrobenzene, 1,3-dinitrobenzene and 2,4-dinitrotoluene at three different concentrations using linear discriminant analysis (LDA). We assess the within-batch reproducibility of the printing process and we report that the sensor polymers show efficient fluorescence quenching capabilities with detection limits of a few parts-per-billion in air. Our approach enables the realization of highly integrated optical sensor arrays in optoelectronic noses for the sensitive and selective detection of nitroaromatic explosive trace vapors using a potentially low-cost digital printing technique suitable for high-volume fabrication. An important challenge is temperature-dependence which is often neglected even though organic emitters are strongly affected by temperature. For some materials, even small changes of a few Kelvin can lead to large changes in the emission intensity making a temperature-control for sensing applications inevitable. Therefore, the temperature-dependence of these sensors is investigated via a heated transparent thin film on the back of such sensors allowing the active layer to be temperature controlled. All of these led to the development of a portable system.

Conference Presentation

Citation Download Citation

Carsten Eschenbaum, Nico Bolse, Ralph Eckstein, Tobias Rödlmeier, Anne Habermehl, Gerardo Hernandez-Sosa, and Ulrich Lemmer "Nitroaromatic explosive vapor detection using a digitally printed sensor array (Conference Presentation)", Proc. SPIE 10364, Organic Sensors and Bioelectronics X, 103640C (19 September 2017); https://doi.org/10.1117/12.2274239

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KEYWORDS

Sensors

Explosives

Printing

Explosives detection

Nose

Optoelectronics

Luminescence

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