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Showing 1 to 13 of 13 for “"sonoluminescence"”.
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Single bubble sonoluminescence
… been directed to the phenomenon of single bubble sonoluminescence, SBSL in which a single, stable, acoustically levitated bubble is made to oscillate with sufficiently large amplitude so as to emit picosecond light pulses in each cycle of the acoustic drive pressure. Remarkably, the phenomenon …
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Single-bubble sonoluminescence
… (SDS) were explored for studies of single-bubble sonoluminescence (SBSL) to test the heated shell model of nonvolatile vaporization. It was found that the surfactant SDS underwent a chemical reaction, entered the bubble’s core and emitted light as evidenced by the presence of C2 emission bands in …
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Spectroscopic studies of sonoluminescence
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:38:51Z Item is restricted indefinitely.
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Mechanoluminescence and Sonoluminescence From Acoustic Cavitation
The effect of single-bubble sonoluminescence (SBSL) intensity and spectral profile from the addition of low concentrations of organics to sulfuric acid has been investigated. It was found that the addition of small quantities of organics to sulfuric acid greatly reduced the total SBSL intensity. …
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Sonoluminescence as a probe of acoustic cavitation
Sonoluminescence is defined as the light emitted when a liquid is irradiated with ultrasound. Sonoluminescence is observed during ultrasonic irradiation of chromium, iron, molybdenum, and tungsten carbonyl solutions. The observed spectral lines correspond to atomic emission from the metal atoms. …
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Spectroscopic Studies of Multi -Bubble and Single Bubble Sonoluminescence
Single bubble sonoluminescence (SBSL) was also studied. Small concentrations of organic solutes suppress SBSL from water containing dissolved air, but only when the solvents are volatile and can enter the bubble interior. These results were interpreted in light of the dissociation hypothesis for …
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Physical Conditions and Chemical Processes During Single-Bubble Sonoluminescence
… chemical processes associated with single-bubble sonoluminescence (SBSL), nonvolatile liquids such as concentrated sulfuric acid (H2SO 4) were explored. The SBSL radiant powers from H2SO 4 aqueous solutions were found to be over 103 times larger than those typically observed for SBSL from water. …
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Bubbles and crystals: time-resolved sonoluminescence, sonocrystallization, and sonofragmentation
… resulting in light emission (single-bubble sonoluminescence, or SBSL). To extract information about conditions during cavitation, both atomic emission lines (usually from noble gases) and the underlying broad continuum present in SBSL have been used as spectroscopic thermometers. …
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Chemical and physical effects of ultrasound: sonoluminescence and materials
… (sonochemistry) and the emission of light (sonoluminescence). The implosive collapse of bubbles in liquids results in an enormous concentration of sound energy into compressional heating of the bubble contents. Therefore, extreme chemical and physical conditions are generated during …
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Sonoluminescence for the quantitative analysis of alkali and alkaline earth chlorides
The use of sonoluminescence for quantitative analysis is demonstrated with possible applications for on-line process measurement. When acoustic energy of sufficiently high intensity is applied to a liquid, microscopic bubbles are generated at weak points in the liquid. These bubbles oscillate …
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CONTROL OF CAVITATION USING DISSOLVED CARBON DIOXIDE FOR DAMAGE-FREE MEGASONIC CLEANING OF WAFERS
… carbon dioxide is a potent inhibitor of sonoluminescence and describes the implications of the finding in the development of improved megasonic cleaning formulations. Megasonic cleaning, or the removal of contaminants particles from wafer surfaces using sound-irradiated cleaning fluids, …
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Ultrasound induced cavitation and sonochemical effects
… the unusual experimentally observed sonoluminescence and sonochemical behavior, are revealed. First, not all chemical reactions associated with bubble oscillation in a sound field have reached thermodynamic equilibrium. Second, chemical kinetics couples closely with the bubble motion …
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The Effect of Static Pressure on the Inertial Cavitation Threshold and Collapse Strength
The amplitude of the acoustic pressure required to nucleate a gas and/or vapor bubble in a fluid, and to have that bubble undergo an inertial collapse, is termed the inertial cavitation threshold. The hydrostatic dependence of the inertial cavitation threshold was measured up to 30 MPa in ultrapure …