The importance of wall chemistry in Nanofluidics

Eijkel, Jan C.T. and Berg van den, Albert (2010) The importance of wall chemistry in Nanofluidics. In: 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2010, 3-7 October 2010, Groningen, the Netherlands.

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Abstract:	It is common knowledge that the surface charge in micro- and nanofluidic systems and hence the intensity of electrokinetic phenomena is a function of pH, ionic strength and type of solute. It is not often realized however that transient changes in surface charge will be accompanied by changes in the concentration of the surface-binding ions. Since the latter effect increases with increasing surface-to-volume ratio, it is especially relevant in nanofluidic systems. Ionic binding also limits the efficiency of voltage gating in so-called ionic transistors, causing changes in ionic concentration rather than changes in surface potential. In this contribution we present a conceptual model that accounts for ion binding.
Item Type:	Conference or Workshop Item
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Biomedical and Environmental Sensor systems (BIOS)
Link to this item:	http://purl.utwente.nl/publications/75867
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