Effect of labyrinth-like arrays formation of nickel nanorods on nickel surface as a result of galvanic substitution reaction in aqueous solutions of CuCl2 and NaCl mixture
https://doi.org/10.17586/2220-8054-2025-16-5-700-705
Abstract
The article describes the nickel surface treatment conditions in aqueous solutions of a mixture of CuCl2 and NaCl salts. This investigation reveals the occurrence of selective etching on the nickel surface, facilitated by a galvanic replacement reaction (GRR). The etching process gives rise to the formation of arrays of labyrinths with walls of nickel nanorods with a diameter ranging from 10 to 50 nanometers and a length of up to 0.5 micrometers are formed, located primarily in the direction perpendicular to the surface. The experimental results obtained have enabled the formulation of hypotheses concerning the sequence of chemical reactions occurring on the surface and the role of the A. Turing diffusion-chemical model in the formation of the observed labyrinths. It has been demonstrated that the presence of such labyrinths on the surface of nickel leads to a decrease in the angles of its wetting with water.
Supporting agencies: This work was partly supported by the Russian Science Foundation (Grant No. 23-19- 00566).
About the Authors
V. P. Tolstoy
Institute of Chemistry, St. Petersburg State University
Russian Federation
Russian Federation
Valeri P. Tolstoy
26, Peterhof, Saint Petersburg, 198504
K. D. Nikitin
Institute of Chemistry, St. Petersburg State University
Russian Federation
Russian Federation
Kirill D. Nikitin
26, Peterhof, Saint Petersburg, 198504
E. V. Batischeva
Institute of Chemistry, St. Petersburg State University
Russian Federation
Russian Federation
Elisaveta V. Batischeva
26, Peterhof, Saint Petersburg, 198504
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For citations:
Tolstoy V.P., Nikitin K.D., Batischeva E.V. Effect of labyrinth-like arrays formation of nickel nanorods on nickel surface as a result of galvanic substitution reaction in aqueous solutions of CuCl2 and NaCl mixture. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(5):700-705. https://doi.org/10.17586/2220-8054-2025-16-5-700-705
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