Studies of Surfactant/Water Systems Near the Critical Micellar Concentration Using Thermal Lens Spectroscopy

Jimmy Castillo, Alberto Fernández, Vladimiro Mujica

Research output: Contribution to journalArticle

7 Citations (Scopus)


A novel application of photothermal spectroscopy to the study of surfactant-water systems near the critical micellar concentration is reported. The thermal lens signal was induced by a slightly soluble dye and was measured with a dual-beam thermal lens spectrometer. For the two surfactants considered: nonyl phenol and Triton X-100, sharp variations of the thermal lens signal were observed at the critical micellar concentration (CMC), namely an increase for nonyl phenol and a decrease for triton X-100. These effects are arguably related to micelle formation. Our work serves as an initial assessment of the potential of the technique for the study of disperse systems of a higher complexity or dark systems where conventional techniques are impossible to apply.

Original languageEnglish
Pages (from-to)105-110
Number of pages6
JournalMikrochimica Acta
Issue number1--2
Publication statusPublished - 1998



  • Micellar solutions
  • Surfactant CMC
  • Thermal lens spectroscopy

ASJC Scopus subject areas

  • Analytical Chemistry

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