Reusable ionogel-based photo-actuators in a lab-on-a-disc

[Display omitted] •An ionogel-based actuator was integrated and tested in a LoaD platform.•The actuator provides an efficient liquid barrier during storage and spinning.•The actuator is simply actuated with a white light LED allowing selected channel opening.•The actuation mechanism is chemically re...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2018-03, Vol.257, p.963-970
Main Authors: Saez, Janire, Glennon, Tom, Czugala, Monika, Tudor, Alexandru, Ducreé, Jens, Diamond, Dermot, Florea, Larisa, Benito-Lopez, Fernando
Format: Article
Language:English
Subjects:
Actuation
Actuator
Component parts
Flow control
Fluids
Ionogel
Lab-on-a-disc
Light emitting diodes
Microfluidics
Photoswitchable
Polymers
Reagents
Regeneration
Smart material
Smart materials
White light
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Summary:[Display omitted] •An ionogel-based actuator was integrated and tested in a LoaD platform.•The actuator provides an efficient liquid barrier during storage and spinning.•The actuator is simply actuated with a white light LED allowing selected channel opening.•The actuation mechanism is chemically reversible.•The lab-on-a-disc platform is reusable. This paper describes the design, fabrication and performance of a reusable ionogel-based photo-actuator, in-situ photopolymerised into a lab-on-a-disc microfluidic device, for flow control. The ionogel provides an effective barrier to liquids during storage of reagents and spinning of the disc. A simple LED (white light) triggers actuation of the ionogel for selective and precise channel opening at a desired location and time. The mechanism of actuation is reversible, and regeneration of the actuator is possible with an acid chloride solution. In order to achieve regeneration, the Lab-on-a-Disc device was designed with a microchannel connected perpendicularly to the bottom of the ionogel actuator (regeneration channel). This configuration allows the acid solution to reach the actuator, independently from the main channel, which initiates ionogel swelling and main channel closure, and thereby enables reusability of the whole device.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2017.11.016