... behavior of an oxide film on a copper electrode in a 0.1 N NaOH solution has been studied by the in- situ photothermal spectroscopy (PTS) method using a polyvinylidene difluoride (PVDF) pyroelectric film ... yield information regarding only the rate of reaction, the influence of diffusion, concentration, temperature, and so on They cannot give information about the chemical identity, structure, configuration, ... polarization, an oxide film was formed on the Au electrode and the corresponding PAS signal shows an increase While continuous cathodic polarization reduces the oxide film so the corresponding photoacoustic...