On the Mechanisms of Coalescence of Nanodroplets and Sintering of Solid Particles
Abstract
The droplet coalescence theory, which implies the refinement and further development of the Frenkel approach, has, for the first time, been used for predicting the characteristic time of coalescence of nanodroplets. The coalescence times obtained for gold nanodroplets agree, in the order of magnitude, with the results of our molecular-dynamics experiments. In addition, the characteristic times of coalescence have been evaluated theoretically for macroscopic droplets of epoxy resin. The results obtained are in good agreement with Geguzin’s experimental data. It has been concluded that the viscous flows arising in coalescing droplets and the corresponding dissipation of the surface free energy underlie the coalescence mechanism of not only macroscopic, but also nanosized droplets. At the same time, the results of our molecular-dynamics calculations and available experimental data indicate that the sintering of crystalline nanoparticles cannot be explained by the Frenkel mechanism of solid body viscous flow.
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The characteristic time of coalescence τ follows linear dependence on initial particle radius r0: τ = η σ r0, where η is shear viscosity coefficient and σ is surface tension.
“The characteristic time of coalescence 𝜏 followed the linear dependence on the initial particle radius 𝑟0: τ = η σ 𝑟0, where 𝜂 is the shear viscosity coefficient, and 𝜎 is the surface tension [82,83,84].”
From Control of Columnar Grain Microstructure in CSD LaNiO3 Films (2023) · cites this paper as [84]
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Control of Columnar Grain Microstructure in CSD LaNiO3 Films
Atanova, A. V., Seregin, D. S., Zhigalina, O. M., Khmelenin, D. N., Orlov, G. A., Turkina, D. I., Sigov, A. S., & Vorotilov, K. A. (2023) · Molecules · doi:10.3390/molecules28041938 · Cited by 5 · see citing works
- Authors
- Samsonov, V. M., Talyzin, I. V., Vasilyev, S. A., & Alymov, M. I.
- Affiliations
- Russian Academy of Sciences (RU)
- ORCID
- Vasilyev, S. A.
- Venue
- Colloid Journal
- Publisher
- Pleiades Publishing Ltd
- Published
- 2020-09
- Volume
- 82
- Issue
- 5
- Pages
- 573-583
- ISSN
- 0010-1303 (ISSN-L)
- 1061-933X
- 1608-3067
- OpenAlex
- W3091636567
- Cited by
- 8
- References
- 0
- Citations by year
- 2023: 2 · 2022: 3 · 2021: 2 · 2020: 1
- FWCI
- 1.24
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Colloid Journal (publishedVersion)
- Topics
- Physical Sciences › Engineering › Computational Mechanics › Fluid Dynamics and Heat Transfer
- Physical Sciences › Engineering › Computational Mechanics › Fluid Dynamics and Thin Films
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › nanoparticles nucleation surface interactions
- Keywords
- sintering, coalescence time, viscous flow, crystalline nanoparticles, molecular dynamics
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