Repozytorium publikacji - Politechnika Gdańska

This work presents the results of fluctuationenhanced sensing (FES) of selected organic gases by MoS2 sensor fabricated via a simple ink printing method. We demonstrate that low-frequency noise measured under UV irradiation (275 nm) is more sensitive to different gases than measured in the dark. The noise at 1 Hz under UV light increased 3.3, 3.5, 1.6, and 2.9 times for chloroform, tetrahydrofuran, acetonitrile, and acetone ambiances, respectively. By comparing the noise spectra collected in the dark and under UV light, we report that irradiation has a visible effect on the noise in the lowest frequency range (0.125–10 Hz), changing mainly the slope of the spectra. Thus, each organic gas produces a distinct signature by affecting the noise amplitude and the shape of the spectrum. The differences in the characteristic noise features among organic vapors are ascribed to differences in their molecular configuration and polar properties.

Autorzy

• mgr inż. Katarzyna Drozdowska link otwiera się w nowej karcie ,
• prof. dr hab. inż. Janusz Smulko link otwiera się w nowej karcie ,
• Sergey Rumyantsev,
• dr inż. Andrzej Kwiatkowski link otwiera się w nowej karcie