Characteristics of nanoparticles formed during pulsed laser ablation of SrBi2Ta2O9

Kwang Soo Seol, Kazuo Takeuchi, Takeshi Miyagawa, Yoshimichi Ohki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Particle formation was investigated during laser ablation of strontium bismuth tantalate (SBT) with a background of pure oxygen (O2). For an O2 pressure, PO2, varying from 210 to 1300Pa, the mean particle size ranged from 9 to 22nm, and the particle concentration ranged from about 1012 to 108 cm-3. For PO2 = 210 Pa, the particle size ranged from 5 to 30 nm, and for PO2 = 1300 Pa, the particle size ranged from 10 to 80 nm. Transmission electron microscopy measurement of particles sizeclassified at 10 and 20 nm showed that some particles were spherical and others were irregularly shaped. Electron diffraction of the particles showed that the spherical particles were partially crystallized whereas the irregularly shaped particles were amorphous. The formation of these two different morphologies is attributed to different particle cooling rates stemming from spatially nonuniform gas temperatures induced by laser ablation. Regardless of their shape, the particles were composed of strontium, bismuth, tantalum, and oxygen.

Original languageEnglish
Pages (from-to)5654-5658
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number9
DOIs
Publication statusPublished - 2002 Sep

Keywords

  • Laser ablation
  • Morphology
  • Nanoparticles
  • Size distribution
  • SrBiTaO
  • Structure

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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