✦ LIBER ✦
Apparent Contact Angle and Triple-Line Tension of a Soap Bubble on a Substrate
✍ Scribed by João Filipe Rodrigues; Benilde Saramago; Manuel Amaral Fortes
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 113 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
The contact angle, θ , of a small bubble on a flat solid substrate was measured as a function of bubble radius, R. The observed deviation of the contact angle from 90 • can be accounted for in terms of a negative line tension, τ . The measured values of |τ |/γ f , where γ f is the film tension, ranged between 0.15 and 0.6 mm and are proportional to the height, h, of the Plateau border, with |τ | ∼ = 1.7γ f h.