Size-Dependent Surface Tension and Tolman's Length of Droplets

A model for the size-dependent surface tension γlv(D) of liquid droplets, free of any adjustable parameter, is presented in terms of the size-dependent surface energy γsv(D). It is found that γlv(D) drops monotonically with the size of the droplet in the nanometer region. Modeling predictions agree...

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Bibliographic Details
Published in:Langmuir 2005-01, Vol.21 (2), p.779-781
Main Authors: Lu, Hai Ming, Jiang, Qing
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Gas-liquid interface and liquid-liquid interface
General and physical chemistry
Surface physical chemistry
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Summary:A model for the size-dependent surface tension γlv(D) of liquid droplets, free of any adjustable parameter, is presented in terms of the size-dependent surface energy γsv(D). It is found that γlv(D) drops monotonically with the size of the droplet in the nanometer region. Modeling predictions agree with computer simulations for sodium, aluminum, and water droplets. Meanwhile, the Tolman's equation is found to be valid for small particles, and the Tolman's length is always positive and becomes longer when the droplet size is decreased.
ISSN:0743-7463
1520-5827
DOI:10.1021/la0489817