Morphology, optical, and adsorption properties of copper-oxide layers deposited from complex compound solutions
- Authors: Matyushkin L.B.1, Reshetnikova A.A.1, Andronov A.O.1, Afonicheva P.K.1, Myakin S.V.2, Permiakov N.V.1, Moshnikov V.A.1
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Affiliations:
- Saint Petersburg Electrotechnical University “LETI”
- Saint Petersburg State Technological Institute
- Issue: Vol 51, No 5 (2017)
- Pages: 586-590
- Section: Surfaces, Interfaces, and Thin Films
- URL: https://journals.rcsi.science/1063-7826/article/view/199849
- DOI: https://doi.org/10.1134/S1063782617050165
- ID: 199849
Cite item
Abstract
A technique for synthesizing gas-sensing copper-oxide layers by layer-by-layer deposition onto glass and plastic substrates is considered. Deposition is based on the oxidation of a copper–ammonia complex by hydrogen peroxide. Layers synthesized at various numbers of deposition cycles are studied by atomicforce microscopy and transmission spectroscopy methods (300–1000 nm). The spectral shape indicates the mixed nature of the oxide with predominant copper oxide (I) Cu2O with a corresponding band gap of 2.1 eV. The layers have a continuous granular structure. The surface concentration of Brönsted acid adsorption sites with pKa ≈ 2.5 (OH acid groups), determined by the indicator method, is 560 μmol/m2 for the initial films, and threefold increases after heat treatment at 80°C for 30 min. The results obtained are interesting for the use of the described technology for fabricating copper-oxide active layers in gas-sensing sensors operating at room temperature.
About the authors
L. B. Matyushkin
Saint Petersburg Electrotechnical University “LETI”
Author for correspondence.
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376
A. A. Reshetnikova
Saint Petersburg Electrotechnical University “LETI”
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376
A. O. Andronov
Saint Petersburg Electrotechnical University “LETI”
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376
P. K. Afonicheva
Saint Petersburg Electrotechnical University “LETI”
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376
S. V. Myakin
Saint Petersburg State Technological Institute
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 190013
N. V. Permiakov
Saint Petersburg Electrotechnical University “LETI”
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376
V. A. Moshnikov
Saint Petersburg Electrotechnical University “LETI”
Email: leva.matyushkin@gmail.com
Russian Federation, St. Petersburg, 197376