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Information × Registration Number 0223U001183, 0121U111874 , R & D reports Title Plasmon nanostructures "semiconductor-metal-dielectric" for highly sensitive sensors of harmful fumes of organic substances of industrial origin popup.stage_title Head Dorozhynskyi Hlib V., Кандидат технічних наук Registration Date 25-01-2023 Organization VE Lashkarev Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine popup.description2 The sensitivity and selectivity of gas sensors based on the phenomenon of surface plasmon resonance with the created plasmon nanostructures "ITO-Au-PTFE" to harmful vapors of organic substances (hexane, methanol, isopropanol and acetone) were determined experimentally. For comparison, structures without an ITO sublayer and a polytetrafluoroethylene sublayer were additionally investigated. Measurements were carried out on the surface plasmon resonance sensor of the "Plasmon-6" device in the Krechman geometry. Compared to the sensor that had only a layer of gold, the sensitivity increased from 6 to 16 times and depended on the type of substance under investigation. The highest value of sensitivity was determined for acetone vapors, and the lowest for hexane. The detection limit of acetone vapors was experimentally determined - it was 1.47 mg/l. The determined detection limit is lower than the maximum permissible level of acetone vapors in production premises, which is 2.4 mg/l. The selectivity for acetone vapors in relation to monoatomic alcohol vapors increased by 4.2 times in comparison with the prototype structure "Au-PTFE". Experimentally, a linear shift of the resonance characteristics toward larger angles was established as the thickness of polytetrafluoroethylene increased at a rate of 0.27 degrees/nm for λ=650 nm and 0.11 degrees/nm for λ=850 nm. Such a result proved that when moving to the infrared region, it is possible to increase the thickness of the polytetrafluoroethylene layer and at the same time lose less in the range of measurement of resonance angles. When moving from 650 nm to 850 nm, the expansion of the resonance angle measurement range was 4 angular degrees. Methodical recommendations were developed for the detection of harmful vapors of organic substances by sensors with created nanostructures. Product Description popup.authors Fedorenko Artem popup.nrat_date 2023-01-25 Close