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

Germain Puccetti, Roger Leblanc

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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
Pages (from-to)7258-7265
Number of pages8
JournalJournal of Chemical Physics
Volume108
Issue number17
StatePublished - May 1 1998

Fingerprint

Photoacoustic spectroscopy
Liquid Crystals
photoacoustic spectroscopy
electromagnetic absorption
visibility
Visibility
Light scattering
Light absorption
light scattering
Thermodynamic properties
Optical properties
thermodynamic properties
Phase transitions
liquid crystals
optical properties
optical measurement
profiles
configurations
scattering
excitation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Influence of thermal and optical properties on the visibility of liquid-crystal phase transitions in photoacoustic spectroscopy. / Puccetti, Germain; Leblanc, Roger.

In: Journal of Chemical Physics, Vol. 108, No. 17, 01.05.1998, p. 7258-7265.

Research output: Contribution to journalArticle

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