Difference between revisions of "Elektrowetting"

Revision as of 00:15, 31 January 2015

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 [1]

DIY experiment

What you need:

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

What you can do:

DIY Designs

x350px
Miri PCB Electrode Design

Bio Device

Surface Coating

Electronic Control

[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

Patents

AM-(TFT-)EWOD Patent

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