Young-Lippmann equation revisited for nano-suspensions

Daniel Orejon, Khellil Sefiane, Martin E. R. Shanahan

Research output: Contribution to journalArticlepeer-review

Abstract

We present the results of an experimental study investigating electrowetting effects in nano-suspension drops. Wetting of sessile drops of titanium oxide (TiO2) nano-particles dispersed in deionised water was studied under a DC voltage potential. The presence of nano-particles is found to further enhance spreading of drops when a DC potential is applied. Results are explained based on the change in interfacial energy induced by nano-particle adsorption at the solid-liquid interface. An amendment of the Young-Lippmann equation accounting for the presence of nano-particles is proposed. The electrowetting expression proposed is validated against the experimental data for substrates with various dielectric thicknesses. (C) 2013 AIP Publishing LLC.

Original languageEnglish
Article number201601
Number of pages3
JournalApplied Physics Letters
Volume102
Issue number20
DOIs
Publication statusPublished - 20 May 2013

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