Přehled o publikaci

This invention relates to materials for the detection and storage of odor traces secured at the scene of the crime, or the detection and storage of odor traces of persons suspected of committing criminal activity, using functionalized nanofibers specifically modified on the surface for sensitive quantitative and qualitative detection of odor traces. This solution can be used especially for forensic technology, but also for use on the widest possible scale by other state security forces. The aim of the invention is to provide an odor sensor on a different basis than Aratex used so far. This goal is achieved by a nanofiber odor sensor for adsorbing the olfactory trace of human odor, containing polyvinyl butyral (PVB) nanofibers. The advantage of the aforementioned nanofiber odor sensor is its low weight and high ratio of collection area (active surface) in relation to volume and weight. The active surface of the nanofibrous layers can be up to several orders of magnitude larger than the current Aratex odor trace collector, which is made up of fibers with a thickness of several to tens of micrometers. As a result of the properties of nanofiber sensors, a high efficiency of gas molecule collection is achieved with the possibility of applying gas and liquid chromatography for the analysis of substances and also for use in forensic practice. The used PVB nanofibers are characterized by a diameter of several hundreds of nanometers to units of micrometers, typically prepared by electrostatic or centrifugal spinning of synthetic PVB with a specific functionality adapted to the collection of human odor.