Polynuclear crystal growth in electrocrystallization of silver: Determining the nucleus size via the nucleation theorem |
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| Authors: | V. Bostanov A. I. Masliy E. Mladenova |
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| Affiliation: | (1) Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, ul. Acad. G. Bonchev 11, Sofia, 1113, Bulgaria;(2) Institute of Solid-State Chemistry and Mechanochemistry, Sibirian Division, Russian Academy of Sciences, ul. Michurina 15, Novosibirsk, 630091, Russia |
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| Abstract: | We employ the nucleation theorem for a model-independent determination of the size of the two-dimensional (2D) Ag nucleus with the aid of experimental data for nucleation-mediated electrochemical crystal growth. The growth is investigated of a screw dislocation-free Ag(100) single crystal face in aqueous solution of AgNO3 at 318 K. The data are for the stationary values of the overpotential during galvanostatic pulses with sufficiently high amplitudes to ensure polynuclear growth mechanism. It is found that the Gibbs-Thomson equation of the classical theory of 2D nucleation describes very well the experimentally obtained overpotential dependence of the size of the 2D Ag nucleus. Published in Russian in Elektrokhimiya, 2008, vol. 44, No. 6, pp. 698–703. The text was submitted by the authors in English. |
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| Keywords: | crystal growth electrocrystallization 2D nucleation nucleation theorem nucleus size |
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