8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-473-C7-476
Photoacoustic and photothermal detection of photosensitized oxygenationsP. Poulet1, A. Salnick1, J. Szurkowski2 and J. Chambron1
1 URA 1173 du CNRS, Institut de Physique Biologique, Faculté de Médecine, 67085 Strasbourg cedex, France
2 Institute of Experimental Physics, University of Gdansk, 80-952 Gdansk, Poland
Study of relaxation processes of excited states of hematoporphyrin IX (HP) solutions (in ethanol and methanol) in the presence of tetramethyl ethylene chemical acceptor using both the photoacoustic (PA) - microphone - and photothermal (PT) - PZT - detection, is described. A significant difference between PA and PT signal behaviour has been observed when extremely low (down to 1.25 µM, PT measurements) and high (up to 2.5 mM, PA measurements) concentrations of sensitizer were used.
© EDP Sciences 1994