Using a technique employed by astronomers to determine stellar surface temperatures, chemists at the University of Illinois at Urbana-Champaign have measured the temperature inside a single, acoustically driven collapsing bubble. Their results seem out of this world.
"When bubbles in a liquid get compressed, the insides get hot - very hot," said Ken Suslick, the Marvin T. Schmidt Professor of Chemistry at Illinois and a researcher at the Beckman Institute for Advanced Science and Technology. "Nobody has been able to measure the temperature inside a single collapsing bubble before. The temperature we measured - about 20,000 degrees Kelvin - is four times hotter than the surface of our sun."
This result, reported in the March 3 issue of the journal Nature by Suslick and graduate student David Flannigan, already has raised eyebrows. Their work is funded by The National Science Foundation and the Defense Advanced Research Projects Agency.
James E. Kloeppel | News Bureau
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