Sonoluminescence from Glycerine–Water Mixtures

Gutenkunst Sonoluminescence Extracting Light from Water :

compounds on Earth. No known form of life can survive without it, and for a human, a day without water is a day of suffering. Water is such a familiar element in everyday life that one might assume that it is completely understood. Unfortunately, that is not true. Our ignorance is well illustrated by sonoluminescence, the astounding ability of water to concentrate energy from sound waves into f...

Modelling Sonoluminescence

In single-bubble sonoluminescence, a bubble trapped by a sound wave in a flask of liquid is forced to expand and contract; exactly once per cycle, the bubble emits a very sharp (< 50ps) pulse of visible light. This is a robust phenomenon observable to the naked eye, yet the mechanism whereby the light is produced is not well understood. One model that has been proposed is that the light is ”vac...

Sonoluminescence from Nonaqueous Liquids: Emission from Small Molecules

Sonoluminescence spectra from nonaqueous liquids under a variety of gases are presented. Ultrasonic irradiation of alkanes under Ar leads to emission from C2, C2H, and CH. When nitrogen is present, emission is seen from CN. When oxygen is present, emission from COz, CH, and OH is observed. Ultrasonic irradiation of tetrachloroethylene or CCI4 leads to emission from CI2. The intensity of sonolum...

Sonoluminescence and Sonochemistry

Sonoluminescence: When bubbles glow

In single-bubble sonoluminescence, an ultrasound-driven microbubble undergoes violent oscillations and converts part of the energy of the sound field into visible light. Since its discovery ten years ago, a consistent theory of the dynamics and stability of the bubble has been developed. The approach includes the dissociation of molecular gases inside the collapsing bubble to explain striking d...