Abstract

Photoacoustic (PA) signals have been measured in situ in the 300–750 nm range during constant-current growth of β-PbO2 films on a platinum electrode in aqueous Pb(ClO4)2/HClO4 solution. The structure seen in the PA signals at constant wavelength arises from optical interference. An analysis of the PA signals in terms of reflectivity of the electrode/solution interface is presented, from which the optical constants of the β-PbO2 film (index of refraction and absorption constant) have been obtained in the 300–750 nm region.

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