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Dye-free, simultaneous and multianalyte optical recognition using ionic liquid-based polymeric membrane

Kavanagh, Andrew and Diamond, Dermot and Radu, Aleksandar (2009) Dye-free, simultaneous and multianalyte optical recognition using ionic liquid-based polymeric membrane. In: AsiaSense 2009 - 4th international conference on sensors, 29-31 July, 2009, Bangkok, Thailand.

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Abstract

The vast majority of chemical sensors are based on a ligand that selectively bind ion of interest. The ligand is typically incorporated within a polymer matrix. In addition to ligand, polymer membrane-based chemical sensors normally require an ion-exchanger and if detection is performed using optical spectroscopy, an additional dye. Such membrane can therefore contain up to five components (polymer, plasticizer, ligand, ion-exchanger and dye). In today’s trend of drastic miniaturization, cross-contamination of sensors and leaching of active components becomes serious issue and there are many examples of the works trying to reduce/stop the leaching. In this work we explore the potential for utilization of more universal components that can take several roles thereby reducing the actual number of active components while retaining the functionality. An interesting consequence of such approach is their generalization hence introduction of the capability for simultaneous multianalyte detection – a concept departing from traditional view of chemical sensors: "one sensor for one ion". In our work we use ionic liquids – a remarkable class of compounds that have so far find application in many application areas. We demonstrate their universality by showing that they can behave as ligands, ion-exchangers and plasticizers, all in the same time. This allows significant simplification of chemical sensors. Moreover, we demonstrate that a system containing only polymer (PVC) and ionic liquid (behaving as ligand, ion exchanger and plasticizer) is capable of simultaneous recognition of two ions in the same time. Due to the relative ease of ionic liquid synthesis, we envision design of ionic liquids whose functionality can approach today’s best ionophore-based sensors.

Item Type:Conference or Workshop Item (Speech)
Event Type:Conference
Refereed:No
Subjects:Physical Sciences > Chemical detectors
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)
Official URL:http://www.nstda.or.th/asiasense2009
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland
ID Code:6632
Deposited On:05 Aug 2009 11:30 by Aleksandar Radu. Last Modified 29 Apr 2010 13:48

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