| Autor: |
Dorozinsky, G. V., Kachur, N. V., Dorozinska, H. V., Fedorenko, A. V., Yatsenko, I. V., Maslov, V. P. |
| Zdroj: |
Optical & Quantum Electronics; Jul2024, Vol. 56 Issue 7, p1-19, 19p |
| Abstrakt: |
Offered, developed and experimentally tested in this work is the multilayer element highly sensitive to n-hexane vapors. This element is aimed to be used in the surface plasmon resonance (SPR) sensor with a plasmon-carrying gold layer covered with a sorption layer of zinc oxide (ZnO).The bandgap width for the films obtained by the sol–gel method was Eg = 3.198…3.3 eV depending on the thickness of the oxide film. The bulk porosity of the layers was 15.5 up to 69.5 vol.%, also in dependency on the oxide layer thickness. The surface micro-roughness of ZnO layer with the optimal thickness close to 20 nm was increased by 4.4 times as compared with that of pure gold surface without ZnO layer. Sensory properties of sensitive elements were studied relatively to vapors of the following solvents in air: isopropanol, acetone and n-hexane. The highest sensitivity of the sensor was determined towards n-hexane. The response of SPR sensor, when using the additional ZnO layer of the optimal thickness 20 nm, was fourfold increased from 247 up to 952 ang.sec., if comparing with the sensor without ZnO layer. The selectivity to hexane as compared with that for isopropanol and acetone in the case of the of ZnO-modified sensorwas enhanced practically twofold from 3.1 up to 5.6 times. The obtained results can be applied to monitor n-hexane vapors in air. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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