Tin oxide semiconducting nanomaterial, gas sensor electrode and process for forming the same, and gas sensing device including the gas sensor electrode

Abstract

A gas sensing device (20) includes a gas sensor electrode (10), a variable resistor (21) electrically coupled in parallel to the gas sensor electrode (10), and a voltage measuring circuit (22) electrically coupled in parallel to the variable resistor (21). The gas sensor electrode (10) includes a substrate (11) and a gas sensing layer (12) that is formed on the substrate (11) and made of a tin oxide semiconducting nanomaterial having a resistivity not greater than 5000 ohm-meter. A process for forming the gas sensor electrode (10) is also disclosed.