Development of the colorimetric sensor array for detection of explosives and volatile organic compounds in air

N. V. Kostesha; T. S. Alstrøm; C. Johnsen; K. A. Nilesen; J. O. Jeppesen; J. Larsen; M. H. Jakobsen; A. Boisen

doi:10.1117/12.850310

24 April 2010 Development of the colorimetric sensor array for detection of explosives and volatile organic compounds in air

N. V. Kostesha, T. S. Alstrøm, C. Johnsen, K. A. Nilesen, J. O. Jeppesen, J. Larsen, M. H. Jakobsen, A. Boisen

Author Affiliations +

Proceedings Volume 7673, Advanced Environmental, Chemical, and Biological Sensing Technologies VII; 76730I (2010) https://doi.org/10.1117/12.850310
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

In the framework of the research project 'Xsense' at the Technical University of Denmark (DTU) we are developing a simple colorimetric sensor array which can be useful in detection of explosives like DNT and TNT, and identification of volatile organic compounds in the presence of water vapor in air. The technology is based on an array of chemo-responsive dyes immobilized on a solid support. Upon exposure to the analyte in suspicion the dye array changes color. Each chosen dye reacts chemo selectively with analytes of interest. A change in a color signature indicates the presence of unknown explosives and volatile organic compounds (VOCs). We are working towards the selection of dyes that undergo color changes in the presence of explosives and VOCs, as well as the development of an immobilization method for the molecules. Digital imaging of the dye array before and after exposure to the analytes creates a color difference map which gives a unique fingerprint for each explosive and volatile organic compound. Such sensing technology can be used to screen for relevant explosives in a complex background as well as to distinguish mixtures of volatile organic compounds distributed in gas phase. This sensor array is inexpensive, and can potentially be produced as single use disposable.

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N. V. Kostesha, T. S. Alstrøm, C. Johnsen, K. A. Nilesen, J. O. Jeppesen, J. Larsen, M. H. Jakobsen, and A. Boisen "Development of the colorimetric sensor array for detection of explosives and volatile organic compounds in air", Proc. SPIE 7673, Advanced Environmental, Chemical, and Biological Sensing Technologies VII, 76730I (24 April 2010); https://doi.org/10.1117/12.850310

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