کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5415958 | 1393787 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Emission spectroscopy of atmospheric pressure plasmas for bio-medical and environmental applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The paper demonstrates several ways of use of the UV-vis optical emission spectroscopy of medium resolution for the diagnostics of atmospheric pressure air and nitrogen plasmas relevant to bio-medical and environmental applications. Plasmas generated by DC discharges (streamer corona, transient spark, and glow discharge), AC microdischarges in porous ceramics, and microwave plasma were investigated. Molecular (OH, NO, CN) and atomic (H, O, N) radicals, and other active species, e.g. N2 (C, B, A), N2+ (B), were identified. The composition of the emission spectra gives insight in the ongoing plasma chemistry. Rotational, i.e. gas, and vibrational temperatures were evaluated by fitting experimental with simulated spectra. Streamer corona, transient spark and microdischarges generate cold, strongly non-equilibrium plasmas (300-550Â K), glow discharge plasma is hotter, yet non-equilibrium (1900Â K), and microwave plasma is very hot and thermal (â¼3000-4000Â K). Electronic excitation temperature and OH radical concentration were estimated in the glow discharge assuming the chemical equilibrium and Boltzmann distribution (9800Â K, 3Â ÃÂ 1016Â cmâ3). Optical emission also provided the measurement of the active plasma size of the glow discharge, and enabled calculating its electron number density (1012Â cmâ3).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 243, Issue 2, June 2007, Pages 194-201
Journal: Journal of Molecular Spectroscopy - Volume 243, Issue 2, June 2007, Pages 194-201
نویسندگان
Z. Machala, M. Janda, K. Hensel, I. Jedlovský, L. LeÅ¡tinská, V. Foltin, V. MartiÅ¡ovitÅ¡, M. Morvová,