Abstract
The kinetics of nucleus growth from a parent nanophase medium with a limited stock of material has been theoretically studied in the presence of possible growth arrest caused by destruction of the source of supersaturation. This regime is characteristic of the island growth of GaAs nanowires (NWs) from a Ga nanodroplet via the vapor–liquid–solid (VLS) mechanism as observed during in situ diagnostics of NW growth inside a transmission electron microscope. A fundamentally new hierarchy of time scales is established, according to which the entire cycle of monocentric nucleation and growth can be divided into three stages: (i) fast growth of nucleus until the growth arrest, (ii) slow growth at a rate of material supply to the nanophase, and (iii) nanophase pumping up to the initial state. The criterion of growth arrest is formulated as dependent on the nanophase size.
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Funding
This work was supported in part by the Russian Foundation for Basic Research, projects nos. 18-02-40006, 19-52-53031, and 20-02-00351.
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Translated by P. Pozdeev
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Dubrovskii, V.G. Kinetics of Nucleus Growth from a Nanophase. Tech. Phys. Lett. 46, 357–360 (2020). https://doi.org/10.1134/S1063785020040203
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DOI: https://doi.org/10.1134/S1063785020040203