Towards Ultra-Portable Hybrid Organic/Inorganic Explosives Sensing Devices
Chapter 8 describes some potential portable explosive sensors based on organic polymers. A CMOS lifetime micro-system, developed at the University of Edinburgh, can measure nanosecond time-scale PL decay. This is adapted as a tool for trace explosive detection. The vapour molecules reversibly quench the light emission from the copolymer CDT Green and change the PL decay lifetime. The integration of the micro-LEDs as optical excitation, the CMOS micro-system as detector, and the organic semiconductor as sensing element, promises an inexpensive and ultra-portable explosive detector. At the end of the chapter, a compact LED-pumped BBEHP-PPV laser is also used for the detection of low vapour pressure explosives with very fast responsivity.
KeywordsInstrument Response Function Explosive Detection Constant Fraction Discriminator Single Photon Avalanche Diode Fluorescence Decay Lifetime
- 1.Woodfin, R. L. (2007). Trace chemical sensing of explosives. Newyork: Wiley-Interscience.Google Scholar
- 2.Fido® Explosives Detector Technical Review- online document. http://gs.flir.com/detection/explosives/fido/
- 3.Cavaye, H., Shaw, P. E., Wang, X., Burn, P. L., Lo, S. C., Meredith, P. (2010). Effect of dimensionality in dendrimeric and polymeric fluorescent materials for detecting explosives. Macromolecules, 43 (24), 10253–10261.Google Scholar
- 4.Olley, D. A., Wren, E. J., Vamvounis, G., Fernee, M. J., Wang, X., Burn, P. L., Meredith, P., Shaw, P. E. (2011). Explosive sensing with fluorescent dendrimers: The role of collisional quenching. J. Mater. Chem, 23 (3), 789–794.Google Scholar
- 6.Wang, Y., Turnbull, G. A., Samuel, I. D. W. (2011). Conjugated polymer sensors for explosive vapor detection. Proceedings of SPIE, 8118(1).Google Scholar