 ISSN 0235-7216 ISSN 2424-4538 (online) |
2007 m. Nr. 1 Photoelectrochemical properties of oxide layers
formed on sputtered copper coatings in Cu(II)
solutions containing ethylenediamine and β-alanine
Copper layers obtained by magnetron sputtering on glass substrate were exposed to 0.01 M Cu(II) solutions containing 0.005 M ethylenediamine or 0.04 M of b-alanine at pH 5.2 and 6.0, respectively. According to XPS data, non-uniform layers involving cuprous oxide are formed with the absorption coefficient equal to (5.7–5.8) × 104 cm–1. When the Cu|solution boundary is excited by the pulses of polychromatic light, oxide layers display the types of conductivity that are opposite to these established for the galvanic copper coatings under the same conditions. Photopotentials and photocurrents also change their sign when the light perturbation is directed to the glass|Cu boundary. Keywords: copper, sputtering, oxides, ethylenediamine, b-alanine, photoresponse |
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