Prog. Theor. Phys. Supplement No.161 (2006) pp. 286-289
Change in the Mode of Spontaneous Motion of an Alcohol Droplet Caused by a Temperature Change
Department of Physics, Graduate School of Science,
Kyoto University, Kyoto 606-8502, Japan
(Received July 4, 2005)
An alcohol (pentanol) droplet exhibits spontaneous motion on an aqueous
solution, driven by a solutal Marangoni effect. We found that the mode of such
droplet motion changes depending on the temperature of the aqueous phase. When
the temperature of the aqueous phase is 20 °C, a droplet with a
volume of 1 µl exhibits vectorial motion, whereas when the
temperature is 25 °C, the droplet exhibits irregular motion. We
discuss the mode change in relation to the solubility of pentanol in water.
DOI : 10.1143/PTPS.161.286
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