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Cataphoresis in rotating electric fields

Pugh, E. M. and Swartz, C. A. (1930) Cataphoresis in rotating electric fields. Physical Review, 36 (9). pp. 1495-1502. ISSN 0031-899X. doi:10.1103/PhysRev.36.1495.

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A new method of making cataphoresis measurements on colloid particles has been developed and tested. The method makes use of a rotating electric field which causes the particles to move in circles. In this way it is easily possible to test the effect of variable speed of the particle on the distribution of the diffuse electric double layer surrounding it. The results obtained indicate that this effect is negligible. Furthermore, it has been discovered that the mobility of the small particles (below 10^-4 cm in diameter) fluctuates widely and this is made very evident to the eye by the fluctuations in the circular paths of the particles. The fluctuations are quite violent with particles as small as 10^-6 cm in diameter. Considerable study of these variations has been made as well as an attempt to explain them qualitatively.

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Additional Information:©1930 The American Physical Society. Received 17 September 1930. The authors wish to thank Dr. R. A. Millikan under whose direction it has been a pleasure to do this work and also the American Petroleum Institute for a grant which defrayed the expenses. During the latter part of the research one of the authors (E.M.P.) has been working as a National Research Fellow and wishes to express his gratitude to the National Research Council.
Issue or Number:9
Record Number:CaltechAUTHORS:PUGpr30b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6132
Deposited By: Tony Diaz
Deposited On:27 Nov 2006
Last Modified:08 Nov 2021 20:31

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