Du Noüy ring method
Encyclopedia
The du Noüy ring method is one technique by which the surface tension
of a liquid can be measured. The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid. The force required to raise the ring from the liquid's surface is measured and related to the liquid's surface tension.
This technique was proposed by the French physicist Pierre Lecomte du Noüy
(1883–1947) in a paper published in 1925.
Surface tension
Surface tension is a property of the surface of a liquid that allows it to resist an external force. It is revealed, for example, in floating of some objects on the surface of water, even though they are denser than water, and in the ability of some insects to run on the water surface...
of a liquid can be measured. The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid. The force required to raise the ring from the liquid's surface is measured and related to the liquid's surface tension.
This technique was proposed by the French physicist Pierre Lecomte du Noüy
Pierre Lecomte du Noüy
Pierre Lecomte du Noüy was a French biophysicist and philosopher. He probably is best-remembered by scientists for his work on the surface tension, and other properties, of liquids.- Life and work :...
(1883–1947) in a paper published in 1925.
External links
- Papers of Pierre Lecomte du Noüy, 1883-1972
- Movie showing a du Noüy tensiometer
- Picture of a du Noüy tensiometer (National Institutes of Health)
