najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМОnajo-300Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХEffect 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 mixtureЭффект образования на поверхности никеля лабиринтоподобных массивов из наностержней никеля в результате реакции гальванического замещения в водном растворе смеси солей CuCl2 и NaClhttps://orcid.org/0000-0003-3857-7238ТолстойВалерий ПавловичTolstoyValeri

Профессор кафедры химии твердого тела Института химии СПбГУ, SPIN 45223

Department of Solid State Chemistry, Professor

v.tolstoy@spbu.ruДенисовичНикитин КириллNikitinKirill

Магистрант кафедры химии твердого тела

Master student

st069423@student.spbu.ruБатищеваЕлизавета ВалерьевнаBatischevaElisaveta

Магистрант кафедры химии твердого тела

Master student

batischevaelisaveta@gmail.comИнститут химии СПбГУInstitute of Chemistry, SPbGU202505022026165300Copyright © Tolstoy V., Nikitin K., Batischeva E., 20252025Толстой В.П., Денисович Н.К., Батищева Е.В.Tolstoy V., Nikitin K., Batischeva E.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/300

The article describes for the first time the conditions of nickel surface treatment in aqueous solutions of a mixture of CuCl2 and NaCl salts in which selective etching is observed on its surface with the participation of a galvanic replacement reaction (GRR). Under these conditions, arrays of labyrinths with walls of nickel nanorods with a diameter of 10-50 nm and a length of up to 0.5 microns are formed on the nickel surface, located mainly in the direction perpendicular to the surface. Based on the experimental results obtained, assumptions are made about the sequence of chemical reactions occurring on the surface and the role of the diffusion-chemical A.Turing model in the formation of the observed labyrinths is noted. It is also shown that the formation of these arrays on the nickel surface leads to a decrease in the angles of its wetting with water.

В статье впервые описаны условия обработки поверхности никеля в водных растворах смеси солей CuCl2 и NaCl, при которых на его поверхности наблюдается селективное травление с участием реакции гальванического замещения (GRR). В этих условиях на поверхности никеля образуются массивы лабиринтов со стенками из никелевых наностержней диаметром 10-50 нм и длиной до 0,5 мкм, расположенных преимущественно в направлении, перпендикулярном поверхности. На основании полученных экспериментальных результатов сделаны предположения о последовательности химических реакций, протекающих на поверхности, и отмечена роль диффузионно-химической модели А.Тьюринга в формировании наблюдаемых лабиринтов. 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The authors declare that there are no conflicts of interest present.