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<p>The ultrafine gaps in metal nanostructures are of great significance for improving the performance of nano optoelectronic devices. To address the manufacturing challenges of the ultrafine gaps, a gap regulation method for metal nanostructures is proposed, which combines nanosecond pulse laser shock with momentum transfer in flexible metal thin films. By combining molecular dynamics with experimental research, the dynamic evolution process of high-density dislocations in metal nanoparticles under laser shock was studied, and the interaction between dislocation motion and grain boundaries was investigated. The micro mechanism of high strain rate superplasticity deformation of metal nanoparticles under laser shock and the synergistic deformation process of aluminum film superplasticity flow and radial expansion of gold nanoparticles under laser shock were explored. The mechanism of nanowire gap formed between dual gold nanoparticles was revealed, providing a theoretical basis for high-precision control of nanowire gaps in metal nanostructures.</p>

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Research on the laser shock control of the gap between dual gold nanoparticles

  • 期刊论文

  • 发表日期：

    2025年9月3日

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  • Tian Yuan,
  • Wang Maolu,
  • Chen Yang,
  • Pei Yanbo

摘要

The ultrafine gaps in metal nanostructures are of great significance for improving the performance of nano optoelectronic devices. To address the manufacturing challenges of the ultrafine gaps, a gap regulation method for metal nanostructures is proposed, which combines nanosecond pulse laser shock with momentum transfer in flexible metal thin films. By combining molecular dynamics with experimental research, the dynamic evolution process of high-density dislocations in metal nanoparticles under laser shock was studied, and the interaction between dislocation motion and grain boundaries was investigated. The micro mechanism of high strain rate superplasticity deformation of metal nanoparticles under laser shock and the synergistic deformation process of aluminum film superplasticity flow and radial expansion of gold nanoparticles under laser shock were explored. The mechanism of nanowire gap formed between dual gold nanoparticles was revealed, providing a theoretical basis for high-precision control of nanowire gaps in metal nanostructures.