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. 2022 Jun 13;12(1):9759.
doi: 10.1038/s41598-022-13898-4.

Ultra-sensitive gas sensor based fano resonance modes in periodic and fibonacci quasi-periodic Pt/PtS2 structures

Shrouk E Zaki  1   2 , Mohamed A Basyooni  3   4
Affiliations

Ultra-sensitive gas sensor based fano resonance modes in periodic and fibonacci quasi-periodic Pt/PtS2 structures

Shrouk E Zaki et al. Sci Rep. .

Abstract

Ultra-sensitive greenhouse gas sensors for CO2, N2O, and CH4 gases based on Fano resonance modes have been observed through periodic and quasi-periodic phononic crystal structures. We introduced a novel composite based on metal/2D transition metal dichalcogenides (TMDs), namely; platinum/platinum disulfide (Pt/PtS2) composite materials. Our gas sensors were built based on the periodic and quasi-periodic phononic crystal structures of simple Fibonacci (F(5)) and generalized Fibonacci (FC(7, 1)) quasi-periodic phononic crystal structures. The FC(7, 1) structure represented the highest sensitivity for CO2, N2O, and CH4 gases compared to periodic and F(5) phononic crystal structures. Moreover, very sharp Fano resonance modes were observed for the first time in the investigated gas sensor structures, resulting in high Fano resonance frequency, novel sensitivity, quality factor, and figure of merit values for all gases. The FC(7, 1) quasi-periodic structure introduced the best layer sequences for ultra-sensitive phononic crystal greenhouse gas sensors. The highest sensitivity was introduced by FC(7, 1) quasiperiodic structure for the CH4 with a value of 2.059 (GHz/m.s-1). Further, the temperature effect on the position of Fano resonance modes introduced by FC(7, 1) quasi-periodic PhC gas sensor towards CH4 gas has been introduced in detail. The results show the highest sensitivity at 70 °C with a value of 13.3 (GHz/°C). Moreover, the highest Q and FOM recorded towards CH4 have values of 7809 and 78.1 (m.s-1)-1 respectively at 100 °C.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
(a) The Mechanism of interaction acoustic waves through PhC greenhouse gas sensor structures, (b) the attenuation of the incident acoustic waves within the interface between two layers of the structures.
Figure 2
Figure 2
(a, c, e) introduced the periodic and F(5), FC(7, 1) quasi-periodic PhC gas sensor structures respectively, (b, d, f) Fano resonance transmitted spectra versus normalized frequency towards N2O, CH4, and CO2 greenhouse gases at room temperature of periodic and F(5), FC(7, 1) quasi-periodic PhC gas sensor structures respectively.
Figure 3
Figure 3
Shows the sensitivity of PhC gas sensor structures towards N2O, CH4, and CO2 greenhouse gases at room temperature as a function of the resonance frequency. (A) Periodic PhC structure, (B) F(5) quasi-periodic PhC structure, and (C) FC(7, 1) quasi-periodic structure.
Figure 4
Figure 4
Shows the Quality factor of the periodic and F(5), FC(7, 1) quasi-periodic PhC gas sensor structures towards N2O, CH4, and CO2 gases.
Figure 5
Figure 5
Shows the Quality factor of the periodic and F(5), FC (7, 1) quasi-periodic gas sensor structures towards (a) CH4, (b) CO2, and (c) N2O greenhouse gases.
Figure 6
Figure 6
Illustrates the temperature effect on the (a) Fano resonance peak position of FC(7, 1) quasi-periodic gas sensor towards CH4 gas (b) change of CH4 gas acoustic properties with different temperatures.
Figure 7
Figure 7
Effects of temperature on the resonance frequency and sensitivity of the FC(7, 1) quasi-periodic gas sensor towards CH4 gas at 40, 70, and 100 °C.
Figure 8
Figure 8
Effects of temperature on the quality factor and FOM of the FC(7, 1) quasi-periodic gas sensor towards CH4 gas at 40, 70, and 100 °C.
See this image and copyright information in PMC

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