Spectroscopic measurement of electronic temperature in the bubbles during single- and multibubble sonoluminescence of metal carbonyl solutions and nanodispersed suspensions

G L Sharipov; B M Gareev; A M Abdrakhmanov

doi:10.1016/j.ultsonch.2018.10.028

Spectroscopic measurement of electronic temperature in the bubbles during single- and multibubble sonoluminescence of metal carbonyl solutions and nanodispersed suspensions

Ultrason Sonochem. 2019 Mar:51:178-181. doi: 10.1016/j.ultsonch.2018.10.028. Epub 2018 Oct 22.

Authors

G L Sharipov¹, B M Gareev², A M Abdrakhmanov²

Affiliations

¹ Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Ufa, Russian Federation. Electronic address: glus@anrb.ru.
² Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Ufa, Russian Federation.

PMID: 30381144
DOI: 10.1016/j.ultsonch.2018.10.028

Abstract

It is for the first time that we have obtained emission-line spectra of metal atoms during single-bubble sonoluminescence of metal carbonyl W(CO)₆, Mo(CO)₆, Cr(CO)₆ solutions in dodecane and similar spectra during single- and multibubble sonoluminescence of nanodispersed Cr(CO)₆ suspensions in water, 83% H₂SO₄ and 74% H₃PO₄. Nanodispersed suspensions with an average particle size of 15-20 nm were obtained through sonodispersing and filtering Cr(CO)₆ crystals in water. The method for comparing the intensities of two atomic metal lines made it possible to measure the electronic temperatures achieved in cavitation bubbles under different modes of sonolysis that vary in the range of (4.5-16)·10³ K depending on the mode of sonolysis, the type of liquid and saturating gas (He, Ar, Kr) and the acoustic energy entering the solution or suspension. The electronic temperature for multibubble sonoluminescence is, on the average, by (2-2.5)·10³ K less than for single-bubble sonoluminescence for all liquids in question.

Keywords: Electronic temperatures; Metal carbonyls; Multibubble sonoluminescence; Single-bubble sonoluminescence.