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

doi:10.1063/1.1623629

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

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	5151-5155
Number of pages	5
Journal	Review of Scientific Instruments
Volume	74
Issue number	12
DOIs	https://doi.org/10.1063/1.1623629
State	Published - Dec 2003

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title = "Unique approach to measuring temperature variation of surface tension in smectic liquid crystals",

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%.",

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AU - Veum, M.

AU - Messman, P.

AU - Liu, Z. Q.

AU - Huang, C. C.

AU - Janarthanan, N.

AU - Hsu, C. S.

PY - 2003/12

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AB - 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%.

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

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