Morphology and photoluminescence of nanostructured oxides grown by copper passivation in aqueous potassium hydroxide solution

[Display omitted] •Copper was passivated at potentials ranging from −400 to −100mV in KOH.•Passivation allowed to grow nanowires.•Nanowires were composed of cuprous and cupric oxide. Copper foil was anodized in 1M KOH at potentials ranging from −400 to −100mV vs. Ag|AgCl electrode. Cyclic voltammetr...

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Published inMaterials letters Vol. 198; pp. 89 - 92
Main Authors Stepniowski, Wojciech J., Stojadinović, Stevan, Vasilić, Rastko, Tadić, Nenad, Karczewski, Krzysztof, Abrahami, Shoshan T., Buijnsters, Josephus G., Mol, Johannes M.C.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.07.2017
Elsevier BV
Subjects
Copper oxides
Crystals
Cupric oxide
Cuprous oxide
Materials science
Metal foils
Nanowires
Passivation
Photoluminescence
Potassium hydroxides
Voltammetry
Nanowires
Cuprous oxide
Cupric oxide
Photoluminescence
Passivation
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Summary:[Display omitted] •Copper was passivated at potentials ranging from −400 to −100mV in KOH.•Passivation allowed to grow nanowires.•Nanowires were composed of cuprous and cupric oxide. Copper foil was anodized in 1M KOH at potentials ranging from −400 to −100mV vs. Ag|AgCl electrode. Cyclic voltammetry showed a distinct peak with a maximum at around −150mV. For anodizing at −100 and −200mV, nanowires with diameters of ca. 19 and 24nm respectively were found to be grown. Moreover, photoluminescence and X-ray diffraction show that the dominant phase is the CuO phase. At lower potentials, cuboidal micron sized crystals were formed and Cu2O was found to be the major phase.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2017.03.155