E. N. Korytkova*, A. S. Brovkin, T. P. Maslennikova, L. N. Pivovarova, and I. A. Drozdova
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Admirala Makarova 2, St. Petersburg, 199034 Russia
*e-mail: elkor@list.ru
Received September 28, 2010
Abstract—The growth of nanotubes of the Mg3Si2O5(OH)4 composition with a chrysotile structure has been
investigated under hydrothermal conditions. It has been established that the nanotubes in the axial and radial
directions grow through the step mechanism due to the recrystallization and mass transfer of the components.
The introduction of seeds considerably promotes the growth process, especially at the nanotube ends. The evo-
lution of chrysotile nanotubes with a variation in different physicochemical parameters of synthesis, such as the
temperature, time, NaOH concentration in the reaction medium, and introduction of seeds, has been traced. It
has been demonstrated that the controllable variation in these parameters makes it possible to perform a con-
trolled hydrothermal synthesis of chrysotile nanotubes with specified lengths and aspect ratios.
Keywords: nanotube growth, chrysotile, hydrothermal synthesis parameters, recrystallization, mass transfer of
components, seeds, step mechanism
DOI: 10.1134/S1087659611020076
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