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Peer-reviewedCC BY 4.0Applied Surface Science

Ultrafast laser inducing bulging and nanograin refinement dynamics of polycrystalline nanospikes

  • Djafar Iabbaden
  • Arshak Tsaturyan
  • Jean-Philippe Colombier
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Abstract

Using a hybrid framework that couples the two temperature model parameterized by ab initio optoelectronic data with classical molecular dynamics, we uncover the atomistic mechanisms governing the evolution of Zr polycrystalline nanospikes under an ultrafast pulse. The analysis of the irradiated nanostructures reveals two dominant phenomena near the melting threshold: (i) a shape-morphology transition, evidenced by a bulgingnecking profile at the nanospike apex, characteristic of a capillary-driven viscous flow, and (ii) a significant nanograin refinement, driven by the deep undercooling state achieved through localized rapid melting-cooling.

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Cite

BibTeXRIS
BibTeX
@article{iabbaden2026ultrafast,
  title = {{Ultrafast laser inducing bulging and nanograin refinement dynamics of polycrystalline nanospikes}},
  author = {Djafar Iabbaden and Arshak Tsaturyan and Jean-Philippe Colombier},
  journal = {Applied Surface Science},
  year = {2026},
  month = sep,
  doi = {10.1016/j.apsusc.2026.167282},
  url = {https://ujm.hal.science/ujm-05738029v1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Ultrafast laser inducing bulging and nanograin refinement dynamics of polycrystalline nanospikes
AU  - Djafar Iabbaden
AU  - Arshak Tsaturyan
AU  - Jean-Philippe Colombier
PY  - 2026
DA  - 2026/09/03
JO  - Applied Surface Science
DO  - 10.1016/j.apsusc.2026.167282
UR  - https://ujm.hal.science/ujm-05738029v1
AB  - Using a hybrid framework that couples the two temperature model parameterized by ab initio optoelectronic data with classical molecular dynamics, we uncover the atomistic mechanisms governing the evolution of Zr polycrystalline nanospikes under an ultrafast pulse. The analysis of the irradiated nanostructures reveals two dominant phenomena near the melting threshold: (i) a shape-morphology transition, evidenced by a bulgingnecking profile at the nanospike apex, characteristic of a capillary-driven viscous flow, and (ii) a significant nanograin refinement, driven by the deep undercooling state achieved through localized rapid melting-cooling.
SN  - 0169-4332
SN  - 1873-5584
ER  -