Humidity sensor

Abstract

The present disclosure relates to a device that includes a light source, a detector; and a film having a first surface that includes a transition metal dichalcogenide, where the film is configured to interact with a volume of gas containing a concentration of water vapor, the light source is configured to shine a first light onto the first surface, the film is configured, as a result of the first light, to emit from the first surface a second light, the detector is configured to receive at least a portion of the second light, and the detector is configured to generate a signal proportional to an intensity of the second light.