Ion selective gates: active device component for 3D microfluidic architecture

Riaan Schmuhl

Research output: ThesisPhD Thesis - Research UT, graduation UT

17 Downloads (Pure)

Abstract

This thesis describes the development of porous ion-transport oxide interconnects that allow molecular communication between microchannels in complex microfluidic architectures. New methods to control the permeability of interconnects to certain species by externally tuneable parameters was investigated. DC electric fields were used to impose a driving force for the transport of selected cationic and anionic species. Electric fields are preferred over pressure gradients in nanochannels, because very large pressure drops are required to drive flow in small channels, while typical operating voltages are below the potential difference required for decomposition of water. Applying an external electric field across the interconnects, a potential difference is created across the membrane, which makes it is possible to selectively drive charged species from one liquid into the other through interconnects, by means of ion migration, Fick diffusion and/or electroosmotic flow.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Blank, Dave, Supervisor
  • van den Berg, Albert , Supervisor
  • ten Elshof, Johan Evert, Co-Supervisor
Award date25 Feb 2005
Place of PublicationEnschede
Publisher
Print ISBNs90-365-2146-7
Publication statusPublished - 2005

Fingerprint

Microfluidics
Electric fields
Ions
Microchannels
Pressure gradient
Oxides
Pressure drop
Decomposition
Membranes
Water
Communication
Liquids
Electric potential

Keywords

  • IR-50298

Cite this

Schmuhl, R. (2005). Ion selective gates: active device component for 3D microfluidic architecture. Enschede: University of Twente.
Schmuhl, Riaan. / Ion selective gates : active device component for 3D microfluidic architecture. Enschede : University of Twente, 2005. 85 p.
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Schmuhl, R 2005, 'Ion selective gates: active device component for 3D microfluidic architecture', University of Twente, Enschede.

Ion selective gates : active device component for 3D microfluidic architecture. / Schmuhl, Riaan.

Enschede : University of Twente, 2005. 85 p.

Research output: ThesisPhD Thesis - Research UT, graduation UT

TY - THES

T1 - Ion selective gates

T2 - active device component for 3D microfluidic architecture

AU - Schmuhl, Riaan

PY - 2005

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N2 - This thesis describes the development of porous ion-transport oxide interconnects that allow molecular communication between microchannels in complex microfluidic architectures. New methods to control the permeability of interconnects to certain species by externally tuneable parameters was investigated. DC electric fields were used to impose a driving force for the transport of selected cationic and anionic species. Electric fields are preferred over pressure gradients in nanochannels, because very large pressure drops are required to drive flow in small channels, while typical operating voltages are below the potential difference required for decomposition of water. Applying an external electric field across the interconnects, a potential difference is created across the membrane, which makes it is possible to selectively drive charged species from one liquid into the other through interconnects, by means of ion migration, Fick diffusion and/or electroosmotic flow.

AB - This thesis describes the development of porous ion-transport oxide interconnects that allow molecular communication between microchannels in complex microfluidic architectures. New methods to control the permeability of interconnects to certain species by externally tuneable parameters was investigated. DC electric fields were used to impose a driving force for the transport of selected cationic and anionic species. Electric fields are preferred over pressure gradients in nanochannels, because very large pressure drops are required to drive flow in small channels, while typical operating voltages are below the potential difference required for decomposition of water. Applying an external electric field across the interconnects, a potential difference is created across the membrane, which makes it is possible to selectively drive charged species from one liquid into the other through interconnects, by means of ion migration, Fick diffusion and/or electroosmotic flow.

KW - IR-50298

M3 - PhD Thesis - Research UT, graduation UT

SN - 90-365-2146-7

PB - University of Twente

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Schmuhl R. Ion selective gates: active device component for 3D microfluidic architecture. Enschede: University of Twente, 2005. 85 p.