High performance room temperature CO gas sensor based on CuO/TiO2/N-MWCNTs ternary nanocomposites

Live-tracking of beef freshness by sub-ppb level ammonia detection using WS2/rGO nanoflakes incorporating edge site-enriched acidic sulfur

“…S12†), the WS 2 and WS 2 /rGO electrodes showed negative slopes, indicating the p-type conductivity of the semiconductor. 60,70 The sulfur richness and nitrogen environment play a crucial role in making WS 2 and rGO p-type semiconductors, as S and N act as acceptors and support (enhance) the interaction with NH 3 electrons. 90–92 The sensor exhibited selectivity for NH 3 , numerous electric charge-transfer networks supported by the molecular structure of the analyte, analyte–site interactions, and absorption dynamics (physisorption and chemisorption), which could all presumably improve the NH 3 sensing efficiency of the composite sulfur-rich WS 2 /rGO sensor (Fig.…”

“…This was also done to enable the sensor to be applicable for other uses, such as monitoring in factories, chemical plants, and laboratories, for monitoring environmental pollution, waste gas emissions, gas leakage in dangerous situations, and for healthcare diagnosis. 64–76…”