Gorshkov, Vyacheslav N, Tereshchuk, Vladimir V and Sareh, Pooya 
ORCID: 0000-0003-1836-2598
(2020)
Restructuring and breakup of nanowires with the diamond cubic crystal structure into nanoparticles.
MATERIALS TODAY COMMUNICATIONS, 22.
p. 100727.
Abstract
A kinetic Monte Carlo approach is applied to study physical mechanisms responsible for the breakup of nanowires with the diamond cubic crystal structure into a chain of nanoparticles discovered in preceding experiments on Silicon nanowires. We show that this process is based on the well-known mechanism of roughening transition, which specifically manifests itself in quasi-one-dimensional systems/nanowires with a pronounced anisotropy of the surface energy density. Depending on the temperature and orientation of the nanowire relative to its internal crystal structure, the wavelengths of substantial cross-sectional modulations exceed its initial radius by 4–18 times. For certain orientations, a straight nanowire at the initial stage of evolution forms a serpentine/helical structure. The scenarios of the stage of nanowire ruptures into single nanoclusters are also diverse: either each spindle-shaped region of the nanowire transforms into a separate drop (by long-wave surface perturbations), or the adjacent short-scale beads absorb each other due to the Ostwald ripening effect, which can be accompanied by the formation of long-lived many-body dumbbells. The discovered features of the dynamics of quasi-one-dimensional systems expand our conceptions of the physical mechanisms involved in the breakup of nanowires (presented by Nichols and Mullins as a classical model for such instabilities) which could be useful in applications based on chains of ordered nanoparticles.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Diamond cubic crystal structure, Silicon nanowire breakup, Nanostructure instabilities, Roughening transition, Serpentine structures |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 20 Nov 2019 14:16 |
| Last Modified: | 19 Jan 2023 00:19 |
| DOI: | 10.1016/j.mtcomm.2019.100727 |
| Open Access URL: | https://www.sciencedirect.com/science/article/pii/... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3062565 |
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