On the Mechanism of the Vapor–Solid–Solid Growth of Au-Catalyzed GaAs Nanowires
- Авторы: Koryakin A.1,2, Kukushkin S.1,2,3,4, Sibirev N.2
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Учреждения:
- St. Petersburg Academic University
- ITMO University
- Institute of Problems of Mechanical Engineering, Russian Academy of Sciences
- Peter the Great St. Petersburg Polytechnic University
- Выпуск: Том 53, № 3 (2019)
- Страницы: 350-360
- Раздел: Microcrystalline, Nanocrystalline, Porous, and Composite Semiconductors
- URL: https://journals.rcsi.science/1063-7826/article/view/205860
- DOI: https://doi.org/10.1134/S1063782619030102
- ID: 205860
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Аннотация
The mechanism of the vapor–solid–solid growth of Au-catalyzed GaAs nanowires in the temperature range of 420–450°C is investigated. For the first time, the effect of elastic stresses caused by a difference in the atomic densities of the catalyst and nanowire material on the solid-phase nucleation rate is considered. By assuming that the growth of the GaAs nucleus at the catalyst–nanowire interface is limited by the As-diffusion flux in the catalyst, it is shown that vapor–solid–solid growth can be implemented through the polycentric-nucleation mode in the temperature range under consideration. The intensity of the nucleation of coherent islands upon vapor–solid–solid growth is shown to be higher than the intensity of nucleation in the case of vapor–liquid–solid growth because a low interphase surface energy is implemented at coherent solid–solid conjugation. It is proved that the nucleation of Au-catalyzed GaAs nanowires by the vapor–solid–solid mechanism is possible only when GaAs-island growth proceeds due to As diffusion along the catalyst–nanowire interface.
Об авторах
A. Koryakin
St. Petersburg Academic University; ITMO University
Автор, ответственный за переписку.
Email: alexkorya@gmail.com
Россия, St. Petersburg, 194021; St. Petersburg, 197101
S. Kukushkin
St. Petersburg Academic University; ITMO University; Institute of Problems of Mechanical Engineering, Russian Academy of Sciences; Peter the Great St. Petersburg Polytechnic University
Email: alexkorya@gmail.com
Россия, St. Petersburg, 194021; St. Petersburg, 197101; St. Petersburg, 199178; St. Petersburg, 195251
N. Sibirev
ITMO University
Email: alexkorya@gmail.com
Россия, St. Petersburg, 197101