Pom-pom-like nanowire clusters prepared by potentiostatic oxidation of copper in NH4HCO3 solution

Journal article (2021)

Authors

Anna Brudzisz Military University of Technology
Damian Giziński Military University of Technology
Ewa Wierzbicka Humboldt-Universitat zu Berlin
Krzysztof Karczewski Military University of Technology
U. Tiringer Team Arjan Mol - Mechanical, Maritime and Materials Engineering
P. Taheri Team Peyman Taheri - Mechanical, Maritime and Materials Engineering
Wojciech J. Stępniowski Military University of Technology
Research Group
Team Peyman Taheri (Mechanical, Maritime and Materials Engineering) (TU Delft)
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Published Date

2021

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Peyman Taheri

Abstract

Formation of hemispherical pom-pom-like clusters of nanowires during potentiostatic oxidation of copper in NH4HCO3 is reported. High-purity copper was oxidized in a three-electrode setup at constant electrode potential ranging from 200 mV to 1000 mV vs. Ag|AgCl|sat. KCl for 14 h. The obtained clusters of nanwires were examined using FE-SEM, XRD and XPS techniques. The diameter of nanowires, composed mainly of CuO, Cu2O, Cu(OH)2, and Cu4O3, was ca. 50–70 nm. The diameter of the clusters strongly depends both on the applied potential and the time of electrooxidation, and was found to be in the range of 1–3 μm. The mechanism for the formation of such nanowires clusters is proposed.

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