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Photoactuated ionogel microvalves for water quality on-chip analysis

Publication Date
  • Microfluidics
  • Water Quality
  • Ionogels
  • Ioninc Liquids
  • Environmental Monitoring
  • Communication
  • Design
  • Medicine


Slide 1 Photoactuated Ionogel Microvalves for Water Quality on-­‐Chip Analysis Monika Czugala Dr. F. Benito-­‐Lopez, Prof. Dermot Diamond Dublin City University, Ireland Monday 17 September 12 Research Objectives • Integration of actuators developed in Task 3.7 into a microfluidic platform: -biomimetic structures with detectors -fluidic manifolds -integral reagent addition and calibration standards -integral electronics -communications and power generation/storage • Demonstration of fully functioning analytical platform. • pH and turbidity - indicate that corrective action and investigation is required before it becomes a potential risk - associated with outbreaks of Cryptosporidium (Carlow in 2006 and Galway City in 2007) • nitrite - in public health terms is essential as prolonged exposure can lead to a potential health risk Monday 17 September 12 Photo-responsive micro-valves • Photoswitchable materials - the use of non-contact, non invasive stimuli. • Ionogels containing spiropyran moieties with photochromism properties. • Protonated spiropyran ionogels exhibit a drastic swelling effect. • Shrinking process of the ionogels happen upon white light irradiation. PDMSPDMS FLOW%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%FLOW UV VIS glass)slideglass)slide))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) Linear dimension change - 44% Monday 17 September 12 Nitrite detection micro-fluidic device Monday 17 September 12 Emitter 540 nm Detector 660 nm White LED for Valve actuationMicrochip Microcontroller board Battery Wireless Radio Chip Cradle (in house design) Nitrite detection system Monday 17 September 12 Nitrite detection system )LJXUH�;��&$'�DVVHPEO\�PRGHO�VKRZLQJ�WKH�PLFURIOXLGLF�FUDGOH��PLFURIOXLGLF�F

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