Laser ablation of microparticles for nanostructure generation

  • Palneet Singh Waraich
  • Bo Tan
  • Krishnan Venkatakrishnan
Research Paper

Abstract

The process of laser ablation of microparticles has been shown to generate nanoparticles from microparticles; but the generation of nanoparticle networks from microparticles has never been reported before. We report a unique approach for the generation of nanoparticle networks through ablation of microparticles. Using this approach, two samples containing microparticles of lead oxide (Pb3O4) and nickel oxide (NiO), respectively, were ablated under ambient conditions using a femtosecond laser operating in the MHz repetition rate regime. Nanoparticle networks with particle diameter ranging from 60 to 90 nm were obtained by ablation of microparticles without use of any specialized equipment, catalysts or external stimulants. The formation of finer nanoparticle networks has been explained by considering the low pressure region created by the shockwave, causing rapid condensation of microparticles into finer nanoparticles. A comparison between the nanostructures generated by ablating microparticle and those by ablating bulk substrate was carried out; and a considerable reduction in size and narrowed size distribution was observed. Our nanostructure fabrication technique will be a unique process for nanoparticle network generation from a vast array of materials.

Keywords

Microparticles Nanoparticle network Laser ablation Agglomeration Fluence Fabrication 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Palneet Singh Waraich
    • 1
  • Bo Tan
    • 2
  • Krishnan Venkatakrishnan
    • 1
  1. 1.Department of Mechanical and Industrial EngineeringRyerson UniversityTorontoCanada
  2. 2.Department of Aerospace EngineeringRyerson UniversityTorontoCanada

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