Study of dynamic processes by impulse response photoacoustic spectroscopy

Abstract

Impulse response photoacoustic spectroscopy has been used to study variations in chromophore distribution with time in a dynamic system. A system in which a dye diffuses through a polymer film has been examined, and it is shown that it is possible to monitor the diffusion process in situ and non-destructively. Comparison of the experimental results with a theoretical model demonstrates that the results are consistent with classical diffusion processes.