Journal article
Correlation between Na* emission and "chemically active" acoustic cavitation bubbles
D Sunartio, K Yasui, T Tuziuti, T Kozuka, Y Iida, M Ashokkumar, F Grieser
Chemphyschem | Published : 2007
Abstract
The emission from electronically excited sodium atoms (Na*) from aqueous solutions containing NaCl or sodium dodecylsulfate under ultrasonic irradiation is studied. Evidence is presented that strongly suggests Na* emission arises from a population of bubbles that are sonochemically active but not producing sonoluminescence (SL). Results indicate that the Na* emission intensity is mainly dependent on the concentration of Na+ ions near the bubble/solution interface. The results provide further insight into the origin of alkali metal spectral line emission from sonicated aqueous solutions containing sodium ions. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.