Abstract
SOME preliminary experiments by Vaidyanathan1 show that the diamagnetic susceptibility (χ) decreases as the size of the particle is reduced in the cases of the colloids of bismuth, antimony, and graphite. Detailed and careful experiments by me with much stronger fields have in general confirmed this result. The quantitative variation of χ with the diameter d of the particle has also been studied. The results for bismuth and antimony are affected by oxidation, but in the case of graphite there is no such trouble. A graph drawn between χ and l/d for this element gives a straight line. The inverse of the diameter is a measure of the surface or boundary area of a number of spherical particles in unit mass of the substance. It is thus found that χ decreases proportionately as the boundary area of a given mass is increased.
Similar content being viewed by others
Article PDF
References
Ind. Jour. Phy., 5, 559; 1930.
Proc. Roy. Soc., A, 128, 41; 1930.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
RAMACHANDRA RAO, S. Diamagnetism and the Colloidal State. Nature 128, 153 (1931). https://doi.org/10.1038/128153b0
Issue Date:
DOI: https://doi.org/10.1038/128153b0
This article is cited by
-
Der Aufbau der hochmolekularen organischen Verbindungen
Die Naturwissenschaften (1934)
-
Magnetism of Precipitates of Colloidal Silver
Nature (1932)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.