Electro-osmosis on anisotropic super-hydrophobic surfacesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We give a general theoretical description of electro-osmotic flow at striped superhydrophobic surfaces
in a thin double layer limit, and derive a relation between the electro-osmotic mobility and hydrodynamic
slip-length tensors. Our analysis demonstrates that electro-osmotic flow shows a very rich behavior
controlled by slip length and charge at the gas sectors. In the case of an uncharged liquid-gas interface, the
flow is the same or inhibited relative to the flow in a homogeneous channel with a zero interfacial slip. By
contrast, it can be amplified by several orders of magnitude provided slip regions are uniformly charged.
When gas and solid regions are oppositely charged, we predict a flow reversal, which suggests the
possibility of a huge electro-osmotic slip even for electroneutral surfaces. On the basis of these
observations we suggest strategies for practical microfluidic devices.