Pulsed laser ablation plasmas generated in CO2 under high-pressure conditions up to supercritical fluid

Toru Kato, Sven Stauss, Satoshi Kato, Keiichiro Urabe, Motoyoshi Baba, Tohru Suemoto, Kazuo Terashima

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Pulsed laser ablation of solids in supercritical media has a large potential for nanomaterials fabrication. We investigated plasmas generated by pulsed laser ablation of Ni targets in CO2 at pressures ranging from 0.1 to 16 MPa at 304.5 K. Plasma species were characterized by optical emission spectroscopy, and the evolution of cavitation bubbles and shockwaves were observed by time-resolved shadowgraph imaging. Ni and O atomic emissions decreased with increasing gas pressure; however, near the critical point the intensities reached local maxima, probably due to the enhancement of the plasma excitation and effective quenching resulting from the large density fluctuation.

本文言語English
論文番号224103
ジャーナルApplied Physics Letters
101
22
DOI
出版ステータスPublished - 2012 11月 26
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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