Comparison of single-bubble and multibubble sonoluminescence in sulfuric acid

ANYL 88

Nathan C. Eddingsaas, eddingsa@uiuc.edu, Department of Chemistry, University of Illinois at Urbana-Champaign, Chemical and Life Sciences Laboratory, 600 S. Mathews, Urbana, IL 61801, David J. Flannigan, flanniga@caltech.edu, Department of Chemistry, California Institute of Technology, CA, and Kenneth S. Suslick, ksuslick@uiuc.edu, School of Chemical Sciences Department of Chemistry, University of Illinois: Urbana-Champaign, 600 S. Mathews, Urbana, IL 61801.
The application of ultrasound to a liquid causes the formation and implosive collapse of cavities within a liquid, which creates extreme temperatures and pressures within. In addition, the cavitation is accompanied by production of light, sonoluminescence. The primary methods of inducing sonoluminescence are from a cavitation cloud (i.e., multibubble sonoluminescence, MBSL) and from a single bubble caught in a standing wave within a spherical flask (i.e., single-bubble sonoluminescence, SBSL). Typically SBSL emission is a featureless continuum while MBSL mainly consists of atomic and molecular emissions. The large difference in the emission profiles had made it very difficult to compare the two. We have now obtained strong atomic and molecular emission from both systems allowing for better comparison. The creation of a plasma in each system has been confirmed from the observation of very high energy noble gas atom emission and of ionized noble gas and molecular ion emissions.
 

General Posters
7:00 PM-9:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Analytical Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007