Abstract
There is a critical need to develop an efficient, reliable and highly selective sensor for thedetection of improvised nonmilitary explosives. This paper describes the utilization offunctionalized titania nanotube arrays for sensing improvised organic peroxide explosivessuch as triacetone triperoxide (TATP). TATP forms complexes with titania nanotubearrays (prepared by anodization and sensitized with zinc ions) and thus affects the electronstate of the nanosensing device, which is signaled as a change in current of the overallnanotube material. The response is rapid and a signal of five to eight orders of magnitudeis observed. These nanotube array sensors can be used as hand-held miniaturized devices aswell as large scale portable units for military and homeland security applications.
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