Gas detection complex and method for producing same, gas sensor comprising gas detection complex and method for manufacturing same

A method for detecting a gas, the method comprising:

• preparing a sensor for detecting the gas by coating a complex on a film,
• flowing the gas into the sensor, and
• measuring a change in an electrical resistance of the sensor,
• wherein the complex comprises a nanostructure made of an oxide semiconductor;
• and
• a Terbium (Tb) additive supported on the nanostructure,
• wherein the oxide semiconductor comprises tin oxide (SnO2), and
• wherein an atomic percent of the terbium (Tb) additive is more than 5 at % to 20 at % based on a total element amount of tin (Sn) of the nanostructure, and
• wherein the gas is detected in an atmosphere of a relative humidity of 80% or more.