H2S gas sensing performance and mechanisms using CuO-Al2O3 composite films based on both surface acoustic wave and chemiresistor techniques

Abstract

Richard (2020) H2S gas sensing performance and mechanisms using CuO-Al2O3 composite films based on both surface acoustic wave and chemiresistor techniques.

An integrated platform for metamaterial-based sensing and surface acoustic wave-based acoustofluidics utilising circular interdigital transducers

“…They have been widely used in acoustofluidics to manipulate droplets for sample preparation, sorting, patterning, mixing, pumping, jetting, and nebulisation 40,41 . In addition, SAW devices have been successfully demonstrated as biomolecular and environmental sensors [42][43][44][45][46][47] . However, numerous environmental factors and variations in material characteristics such as conductivity, pressure, mass loading, temperature, humidity and viscosity can influence the SAW sensing mechanism 41 making specificity of these devices complicated.…”

CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

“…Continuous exposure to H 2 S at 2 ppm causes nausea/headaches, while 20 ppm results in fatigue and headache, and concentrations of 50-100 ppm result in loss of appetite, respiratory tract irritation, digestion issues, and loss of breathing with high possibility of death [13,16]. Moreover, an individual's olfaction may quickly fail to function properly when exposed to H 2 S levels of more than 100 ppm for a short period of time [17]. Prolonged exposure to 100 ppb of H 2 S also affects respiration in human cells and causes a deficiency of oxygen in systemic tissues, endangering human health [18,19].…”

Atmospheric Dependence of Thermoelectric Generation in SnO2 Thin Films with Different Intergranular Potential Barriers Utilized for Self-Powered H2S Sensor Fabrication

“…H 2 S is a toxic, corrosive, malodorous (the infamous rotten egg smell), and inflammable gas that is normally generated in sewages, coal mines, and petrochemical industries, where its level is regularly monitored and compared with the permitted levels . The long-term (8 h) and short-term (10 min) exposure levels permitted are 20 and 50 ppm, respectively, and hence, a monitoring and alarming system has to detect parts per million level contaminations. ,,, Even at lower concentration levels, H 2 S is harmful to humans; absorbed by the lungs, H 2 S molecules rapidly erode the respiratory system causing unconsciousness and death in acute cases.…”