Plasma interactions with aminoacid (l-alanine) as a basis of fundamental processes in plasma medicine

Yuichi Setsuhara, Ken Cho, Masaharu Shiratani, Makoto Sekine, Masaru Hori

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Plasma interactions with l-alaine have been studied as a basis of fundamental processes in plasma medicine. The plasma interactions with l-alaine have been examined for investigations of molecular degradations induced by direct exposures with Ar plasma and exposures with UV-VUV photons emitted from the Ar plasma via chemical bonding states analyses using X-ray photoelectron spectroscopy (XPS). The direct Ar-plasma exposure resulted in significant degradations of COOH group and CNH2 group. Separate experiments via irradiation with photons in UV and VUV regions from the Ar plasma showed that the molecular degradation via irradiation with photons in VUV region was much more significant than via irradiation with photons in UV region. These experiments have indicated that the causality of the molecular degradation of the l-alanine during the Ar plasma exposure is considered to be significant in the following order; ions > VUV photons > UV photons ∼ meta-stable radicals. Furthermore, the exposure with Ar-O2 mixture plasma resulted in insignificant change in the XPS C1s spectra for variation of the exposure time ranging from 30 s to 300 s, indicating that the surface etching process is much more considerable than the chemical degradation process.

本文言語English
ページ(範囲)S59-S63
ジャーナルCurrent Applied Physics
13
SUPPL.1
DOI
出版ステータスPublished - 2013 3月 20
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理学および天文学(全般)

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