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Plasma Formation during Acoustic Cavitation : Toward a New Paradigm for Sonochemistry
Author
Source
Advances in Physical Chemistry
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-05-04
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The most recent spectroscopic studies of single bubble (SBSL) and multibubble (MBSL) sonoluminescence reveal that the origin of extreme intrabubble conditions is related to nonequilibrium plasma formed inside the collapsing bubbles.
Analysis of the relative populations of OH(A2Σ+) vibrational states observed during MBSL in water saturated with noble gases shows that in the presence of argon at low ultrasonic frequency weakly excited plasma is formed.
At high-frequency ultrasound the plasma inside the collapsing bubbles exhibits Treanor behavior typical for strong vibrational excitation.
Plasma formation during SBSL was observed in concentrated H2SO4 preequilibrated with Ar.
The light emission spectra exhibit the lines from excited Ar atoms and ionized oxygen O2+.
Formation of O2+ species is inconsistent with any thermal process.
Furthermore, the SBSL spectra in H2SO4 show emission lines from Xe+, Kr+, and Ar+ in full agreement with plasma hypothesis.
The photons and the “hot” particles generated by cavitation bubbles enable the excitation of nonvolatile species in solutions increasing their chemical reactivity.
Secondary sonochemical products may arise from chemically active species that are formed inside the bubble but then diffuse into the liquid phase and react with solution precursors to form a variety of products.
American Psychological Association (APA)
Nikitenko, Sergey I.. 2014. Plasma Formation during Acoustic Cavitation : Toward a New Paradigm for Sonochemistry. Advances in Physical Chemistry،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-451795
Modern Language Association (MLA)
Nikitenko, Sergey I.. Plasma Formation during Acoustic Cavitation : Toward a New Paradigm for Sonochemistry. Advances in Physical Chemistry No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-451795
American Medical Association (AMA)
Nikitenko, Sergey I.. Plasma Formation during Acoustic Cavitation : Toward a New Paradigm for Sonochemistry. Advances in Physical Chemistry. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-451795
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-451795