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Synthesis of Fe–Ni bimetallic nanoparticles from pixel target ablation: plume dynamics and surface characterization

  • Xiaoxu Niu
  • Paul T. Murray
  • Andrew Sarangan
Research Paper

Abstract

A novel Fe–Ni bimetallic nanoparticle synthesis technique, denoted pixel target ablation, is reported. The technique entails ablating a thin film target consisting of patterned Fe and Ni pixels with a selected ratio using a KrF excimer laser. The laser energy breaks a known amount of target materials into metal atoms, which then form nanoparticles by recombination in the gas phase. Due to the nature of thin-film ablation, splashing of large particles was eliminated with the added benefit of minimizing nanoparticle agglomeration. Plume dynamics and surface characterizations were carried out to exploit the formation of Fe–Ni nanoparticles more fully. The composition was readily controlled by varying the initial relative amount of Fe and Ni target pixels. Synthesis of multi-element nanoparticles by pixel target ablation should be possible with any element combination that can be prepared as a thin-film target.

Keywords

Laser ablation Thin film Bimetallic Nanoparticle Iron Nickel Pixel target ablation Multi-element nanoparticle formation 

Notes

Acknowledgments

The authors gratefully acknowledge the help of Dr. Eunsung Shin, Dr. Tyson Back, and Neal Pierce, and many thanks to the group members of nano-fab lab at University of Dayton, Piyush Shah, Jian Gao, Zhi Wu and Alex Watson, for their problem solving suggestions.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Graduate Materials Engineering ProgramUniversity of DaytonDaytonUSA
  2. 2.Research InstituteUniversity of DaytonDaytonUSA
  3. 3.Electro-Optics DepartmentUniversity of DaytonDaytonUSA

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