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Micro-patterning and actuation of phosphonium-based photo-responsive ionogels for micro-fluidic applications

Blin, Candice and Byrne, Robert and Diamond, Dermot and Benito-Lopez, Fernando (2011) Micro-patterning and actuation of phosphonium-based photo-responsive ionogels for micro-fluidic applications. In: COIL-2011 conference, 15-18 Jun 2011, Washington DC. USA.

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Abstract

The concept of “Micro-total-analysis-Systems” or “Lab-on-chip” has emerged over the past 20-years but, despite of the fact their incredible potential to revolutionise analytical science few outputs have reached the market so far[1]. Moreover, important issues like durability, disposability and cost of manufacture slow down the process of the integration of micro-fluidics into commercially relevant analytical products[2]. We believe that the next breakthroughs on micro-fluidic technology will come with the development of unconventional strategies in fundamental material science where ‘switchable’ or ‘stimuli-responsive’ materials, that can be remotely switched between forms with radically different properties, will substitute conventional fluid handling processes in analytical instrumentation[3]. We present the synthesis, surface patterning and characterisation of micro-valve structures and channel constrictors that underpin further movement towards the realization of next generation micro-fluidic components. The micro-structures are fabricated using novel materials (ionogels) based on phosphonium ionic liquids (ILs), and photo-responsive polymer gels with spiropyran moieties. Actuation can be achieved within seconds and easily controlled without the need for any physical contact between the stimulus source (light) and the resulting action, Figure-1. Furthermore, actuation time can be tuned by simply varying the IL-anion, for instance replacing [NTf2]- by [dca]- without changing the micro-fluidic device.

Item Type:Conference or Workshop Item (Invited Talk)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:Ionic liquids; micro valves; spiropyran; microfluidics
Subjects:Physical Sciences > Chemical detectors
Engineering > Environmental engineering
Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation of Ireland under grant 07/CE/I1147
ID Code:16564
Deposited On:07 Sep 2011 11:43 by Fernando Benito-Lopez. Last Modified 07 Sep 2011 11:43

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