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An ellipsometry study of silica nanoparticle layers at the water surface

Zang, Duyang; Stocco, Antonio; Langevin, Dominique; Wei, Bingbo; Binks, Bernard P.

Authors

Duyang Zang

Antonio Stocco

Dominique Langevin

Bingbo Wei



Abstract

We have studied silica nanoparticle layers spread at the air/water interface. The surface pressure of the layers has been determined in a Langmuir trough via two orthogonal Wilhelmy plates. We observed significant differences in surface pressure according to the preparation protocol: layers spread then compressed or layers obtained after successive spreading steps. We also studied the two types of layers by multiple angle of incidence ellipsometry. We introduce a two-layer model which enables us to evaluate the radius of interfacial aggregates and their contact angle with the air/water interface.

Journal Article Type Article
Publication Date Oct 22, 2009
Journal PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Print ISSN 1463-9076
Electronic ISSN 1463-9084
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 11
Issue 41
Pages 9522-9529
APA6 Citation Zang, D., Stocco, A., Langevin, D., Wei, B., & Binks, B. P. (2009). An ellipsometry study of silica nanoparticle layers at the water surface. Physical chemistry chemical physics : PCCP, 11(41), 9522-9529. doi:10.1039/b907903c
DOI https://doi.org/10.1039/b907903c
Keywords Physical and Theoretical Chemistry; General Physics and Astronomy