Unique approach to measuring temperature variation of surface tension in smectic liquid crystals

M. Veum, P. Messman, Z. Q. Liu, C. C. Huang, N. Janarthanan, C. S. Hsu

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The temperature variation of surface tension in free standing films of three liquid-crystal compounds was measured, using a curvature-pressure tensiometer. The tensiometer used a feedback loop to hold constant the curvature of a film, while the temperature of the system was smoothly ramped. A choped intensity-stabilized He-Ne laser beam was reflected from the bubble to a position-sensitive photodiode. Using the tensiometer, the temperature variation of surface tension was obtained in a continuous manner with resolution in surface tension of ∼0.2%.

Original languageEnglish (US)
Pages (from-to)5151-5155
Number of pages5
JournalReview of Scientific Instruments
Volume74
Issue number12
DOIs
StatePublished - Dec 1 2003

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