Measurements of nanoparticle size distribution produced by laser ablation of tungsten and boron-carbide in N2 ambient

Miklós Bereznai, P. Heszler, Z. Tóth, Ola Wilhelmsson, Mats Boman

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Nanoparticles (NPs) were produced by ablating tungsten and boron-carbide (B4C) target materials in atmospheric pressure nitrogen ambient using ArF excimer laser pulses. The size distributions of the NPs formed during the ablation were monitored-within a 7-133 nm size window-by a condensation particle counter connected to a differential mobility analyzer. The laser repetition rate was varied between 1-50 Hz, and the fluence was systematically changed in the range of 0.5-15 J/cm2, for both materials, allowing a comparative study in an extended laser parameter regime. The multishot ablation threshold (Φth) of B4C was determined to be ∼1.9 J/cm2 for the laser used (ArF excimer, λ = 193 nm). Similarly to earlier studies, it was shown that the size distributions consist of mainly small nanoparticles (th. An additional broad peak appears (between 20 and 40 nm) above Φth as a consequence of the thermally induced macroscopic ablation. Chemical composition of deposited polydisperse nanoparticles was studied by X-ray photoelectron spectroscopy showing nitrogen incorporation into the boron-carbide.

Original languageEnglish
Pages (from-to)4368-4372
Number of pages5
JournalApplied Surface Science
Volume252
Issue number13 SPEC. ISS.
DOIs
Publication statusPublished - Apr 30 2006

Fingerprint

Boron carbide
boron carbides
tungsten carbides
Tungsten carbide
Laser ablation
laser ablation
Ablation
ablation
Nanoparticles
nanoparticles
thresholds
Lasers
Nitrogen
lasers
nitrogen
Radiation counters
radiation counters
Excimer lasers
excimers
excimer lasers

Keywords

  • Boron-carbide
  • Laser ablation
  • Nanoparticle
  • Size distribution
  • Tungsten

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Measurements of nanoparticle size distribution produced by laser ablation of tungsten and boron-carbide in N2 ambient. / Bereznai, Miklós; Heszler, P.; Tóth, Z.; Wilhelmsson, Ola; Boman, Mats.

In: Applied Surface Science, Vol. 252, No. 13 SPEC. ISS., 30.04.2006, p. 4368-4372.

Research output: Contribution to journalArticle

Bereznai, Miklós ; Heszler, P. ; Tóth, Z. ; Wilhelmsson, Ola ; Boman, Mats. / Measurements of nanoparticle size distribution produced by laser ablation of tungsten and boron-carbide in N2 ambient. In: Applied Surface Science. 2006 ; Vol. 252, No. 13 SPEC. ISS. pp. 4368-4372.
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