Eletrowetting effect in a nanoporous silica

Weiyi LU, Taewan KIM, Aijie HAN, Xi CHEN, Yu QIAO*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

15 Citations (Scopus)


In the past, electrowetting was usually analyzed on large solid surfaces. In the current study, the effective solid-liquid interfacial tension in a nanoporous silica, which is measured by the ion transport pressure, is investigated experimentally. The interfacial tension decreases as the applied potential difference increases, while the magnitude of variation is much smaller than its bulk counterpart. The effect of the external electric field is saturated at a relatively low voltage. These unique phenomena can be attributed to the confinement effect of nanopore walls. © 2009 American Chemical Society.
Original languageEnglish
Pages (from-to)9463-9466
Number of pages4
Issue number16
Early online date3 Jun 2009
Publication statusPublished - 18 Aug 2009
Externally publishedYes


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