Про механiзм росту наноструктур на поверхнi CdI2

• Main Authors: Bolesta, I. M., Rovetskii, I. N., Yaremko, Z. M., Karbovnyk, I. D., Velgosh, S. R., Partyka, M. V., Gloskovskaya, N. V., Lesivtsiv, V. M.
• Format: Article
• Language: English; Ukrainian
• Published: Publishing house "Academperiodika" 2019
• Subjects: атомно-силова мiкроскопiя; поверхня Ван-дер-Ваальса; нанопори; нанокластери; дифузiя; atomic force microscopy; van der Waals surface; nanopores; nanoclusters; diffusion; -
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019151

Atomic force microscopy studies of the dynamics of the nanostructure formation on a van der Waals surface of CdI2 crystals during aging in air environment under near-equilibrium thermodynamic conditions have been carried out. The nanostructure growth process is found to consist of three stages. At the first stage, there appear nano-sized pores due to the lattice dissolution at the outcrops of screw dislocations or other structural defects. At the second stage, the cone-shaped nanoclusters arise and grow in those nano-sized pores. At the third stage, the nanoclusters coagulate. The growth kinetics of cone-shaped nanoclusters is described by a diffusion model based on the interdiffusion approximation for the components. The growth rate of nanoclusters is shown to depend on the time evolution of the concentration gradient of Cd2+ ions in the near-reaction zone.