Elektrowetting

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Revision as of 22:41, 5 January 2015 by Gaudi (talk | contribs) (References)
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Introduction

  • Electrical charge of the surface changes the shape of water drops (before 1875)
  • Electrowetting is the modification of the wetting properties of a surface by applying different electric fields (1981)
  • "fluid transistor" for manipulating chemical and biological fluids (1980)
  • Electrowetting on this dielectric-coated surface, EWOD (1993)
  • Digital Microfluidic Circuits


What you need:

  • insulating dielectric and hydrophobic layers
  • immiscible fluids
  • DC or RF power
  • mass arrays of miniature interleaved electrodes (Indium tin oxide (ITO))
  • digital control
  • nano droplets


What you can do:

  • move droplets in linear, circular and directed paths
  • pump fluids
  • mix fluids
  • fill reservoirs
  • move droplets over sensors or heaters
  • control fluid flow electronically or optically


source: http://en.wikipedia.org/wiki/Electrowetting

Electrowetting TFT.png
Electrowetting_TFT [1]

DIY experiment

What you need:

  • ribbon cable
  • water, oil
  • high voltage (how high? Amperage? will 80v do?)


What you can do:

Electrowetting DIY setup.png

Bio Device

Electrowetting device sketch.jpg

Surface Coating

Electrowetting coating air.png


Electronic Control

Electrowetting electronics ref1.png Electrowetting electronics ref3.png

Electrowetting electronics ref2.png Electrowetting electronics ref4.png

[1,2,3]

References

On chip Sample preparation utilising EWOD Concept
DNA Lab on a Chip
Sandia Digital Microfluidic Hub
The Electrowetting Display
AM-(TFT-)EWOD Article on AM-(TFT-)EWOD



1 Toward active-matrix lab-on-a-chip: programmable electrofluidic control enabled by arrayed oxide thin film transistors† Joo Hyon Noh, a Jiyong Noh, a Eric Kreit, b Jason Heikenfeld b and Philip D. Rack

2 Electrowetting: from basics to applications, Frieder Mugele 1,3 and Jean-Christophe Baret

3 Programmable large area digital microfluidic array with integrated droplet sensing for bioassays, B. Hadwen, a G. R. Broder, b D. Morganti, b A. Jacobs, a C. Brown, a J. R. Hector, a Y. Kubota c and H. Morgan* b