Silver coated quartz crystal microbalance resonator were covered with CuO nanostructures
Both sides (5 mm in diameter) of a silver-coated quartz crystal microbalance (QCM) resonator were covered with CuO nanostructures; the resonator was used as a sensing probe in a quartz crystal resonator. The resonant frequency shift indicates the absorbance of HCN gas on the sensor. As the specific area of CuO nanostructure used for coating the probe changes from 9.3 m2/g to 1.5 m2/g, the sensitivity reduces from 2.26 to 0.31 Hz/μg. In both reports, the authors showed that the sensitivity of sen