Abstract
ABSTRACT AND INTRODUCTION:
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.
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.
| Original language | English |
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| Title of host publication | The 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2010 |
| Editors | Sabeth Verpoorte, Helen Andersson-Svahn, Jenny Emnéus, Nicole Pamme |
| Place of Publication | San Diego |
| Publisher | The Chemical and Biological Microsystems Society |
| Pages | 1403-1405 |
| Number of pages | 3 |
| ISBN (Print) | 978-0-9798064-3-8 |
| Publication status | Published - 6 Oct 2010 |
| Event | 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2010 - Groningen, Netherlands Duration: 3 Oct 2010 → 7 Oct 2010 Conference number: 14 |
Publication series
| Name | International Conference on Miniaterized Systems for Chemistry and Life Sciences : [proceedings] |
|---|---|
| Publisher | Chemical and Biological Microsystems Society |
| Volume | 2010 |
| ISSN (Print) | 1556-5904 |
Conference
| Conference | 14th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2010 |
|---|---|
| Abbreviated title | MicroTAS 2010 |
| Country/Territory | Netherlands |
| City | Groningen |
| Period | 3/10/10 → 7/10/10 |
Keywords
- Nanofluidics
- Surface charge density
- Surface potential
- Voltage gating
- Ionic transistor
- ISFET
- FlowFET