The immersion of brass in cupric chloride solution produced on it a photosensitive surface film. Changes in the magnitude and direction of the photoelectric effect suggested that an initial film of cuprous chloride was transformed on exposure to light and air to a film of cuprous oxide.
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References
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TrivediA. M., & DesaiM. N., Current Sci, 1956, 25, 354
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PourbaixM., van MuylderJ., & van Laer, P., Corros. Sci, 1967, 7, 795
