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 | |
| State | Published - Dec 2003 |