Influence of thermal and optical properties on the visibility of liquid-crystal phase transitions in photoacoustic spectroscopy

Germain Puccetti, Roger M. Leblanc

Research output: Contribution to journalArticle

8 Scopus citations


The thermal, optical light absorption and light scattering properties of a liquid crystal can be distinguished and separately studied by a single technique, pulsed photoacoustic spectroscopy (PPAS), by using different excitation/detection configurations. The advantages of performing complementary thermal and optical measurements without modifying the sample environment are demonstrated in the case of a typical liquid crystal: 4-octyl-4′-cyanobiphenyl (8CB). Results show that light scattering can strongly influence the PPAS response signal through the light absorption profile, especially at phase transitions subjected to small changes in thermal properties, such as the Nematic/isotrope phase transition.

Original languageEnglish (US)
Pages (from-to)7258-7265
Number of pages8
JournalJournal of Chemical Physics
Issue number17
StatePublished - May 1 1998


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this