Temperature variation of film tension measured by a vibrating membrane tensiometer

M. Veum, C. Pettersen, P. Mach, P. A. Crowell, C. C. Huang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We have constructed a vibrating membrane tensiometer that utilizes a phase lock-in technique to track a resonant peak. This experimental apparatus enables us to obtain the temperature variation of the film tension in a continuous manner. The film tension of two different liquid crystal compounds has been measured with resolution better than 0.2%. The results from a 126 nm-thick film in the crystal-B phase of one compound yield a bulk tension value of 2.5 dyn/cm. We interpret several reproducible features of our tensiometer data in the context of surface and bulk phase transitions.

Original languageEnglish (US)
Pages (from-to)R2192-R2195
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume61
Issue number3
DOIs
StatePublished - Jan 1 2000

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