Highly sensitive methane gas sensor based on Au/UVCFS films coated D-shaped photonic crystal fiber

Abstract

In recent years, the proportion of methane explosion accidents in coal mine production accidents is increasing. The important measure to avoid methane explosion accident is to do well in methane leakage detection. It is difficult for methane gas to pass into the SPR based PCF methane gas sensor. In order to address this issue, a D-shaped PCF methane gas sensor based on surface plasmon resonance was proposed and investigated based on the finite element method in this paper. A side polished air hole in the D-shaped PCF was utilized as the substrates for depositing gold film and methane gas sensitive film. The sensing area is in direct contact with the outside world. Simulation results showed that the methane gas measurement sensitivity reached 9.88 nm/% at the methane concentration of 0-3.5%. The designed sensor is expected to be a candidate for methane gas leakage detection.

Simulation of the Xenes nanoribbons for sensing CO, CO2, and CH4 gases

“…Since carbon monoxide (CO), carbon dioxide (CO 2 ), and methane (CH 4 ) are the most abundant gases that human deal with, it is essential to design a gas sensor to detect such toxic gases with appropriate selectivity for a particular gas [1][2][3][4]. Even though CH 4 is not classified as a toxic gas, it is highly flammable and can cause explosion at high concentration ranging from 5% to 15% in the air [5][6][7][8]. On the other hand, CO is greatly poisonous [9,10], and CO 2 is one of the greenhouse gases that has a major impact on global warming [11][12][13].…”