
The Rainbow Film That Wasn’t a Failure
A sputtered zinc oxide film was expected to be uniform. Its unexpected colors revealed hidden differences in structure, composition, electrical behavior, and gas-sensing performance across a single glass slide.

Publications on chemiresistive and semiconductor gas sensors, mostly built from doped or nanostructured ZnO thin films, targeting ammonia, ethanol, acetaldehyde, xylene, and other vapors at room temperature. Each entry covers how the sensing film was made, what it detects, and how sensitive and selective it is.

A thick ZnO film is evaluated for its room-temperature sensing performance across a range of volatile organic compounds.

A sputtered zinc oxide film was expected to be uniform. Its unexpected colors revealed hidden differences in structure, composition, electrical behavior, and gas-sensing performance across a single glass slide.