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Schizophrenic Molecules and Materials with Multiple Personalities - How Materials Science could Revolutionise How we do Chemical Sensing

Published online by Cambridge University Press:  31 January 2011

Robert Byrne ,
Silvia Scarmagnani ,
Alex Radu ,
Fernando Benito-Lopez  and
Dermot Diamond
Robert Byrne
Affiliation:
robert.byrne@dcu.ie, National Centre for Sensor Research, Dublin, Ireland
Silvia Scarmagnani
Affiliation:
silvia.scarmagnani2@mail.dcu.ie, National Centre for Sensor Research, Dublin, Ireland
Alex Radu
Affiliation:
Aleksandar.Radu@dcu.ie, National Centre for Sensor Research, Dublin, Ireland
Fernando Benito-Lopez
Affiliation:
fernando.lopez@dcu.ie, National Centre for Sensor Research, Dublin, Ireland
Dermot Diamond
Affiliation:
dermot.diamond@dcu.ie, National Centre of Sensor Research, Dublin City University, Dublin 9, Dublin, D24, Ireland
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Abstract

Molecular photoswitches like spiropyrans derivatives offer exciting possibilities for the development of analytical platforms incorporating photo-responsive materials for functions such as light-activated guest uptake and release and optical reporting on status (passive form, free active form, guest bound to active form). In particular, these switchable materials hold tremendous promise for microflow-systems, in view of the fact that their behaviour can be controlled and interrogated remotely using light from LEDs, without the need for direct physical contact. We demonstrate the immobilisation of these materials on microbeads which can be incorporated into a microflow system to facilitate photoswitchable guest uptake and release. We also introduce novel hybrid materials based on spiropyrans derivatives grafted onto a polymer backbone which, in the presence of an ionic liquid, produces a gel-like material capable of significant photoactuation behaviour. We demonstrate how this material can be incorporated into microfluidic platforms to produce valve-like structures capable of controlling liquid movement using light.

Keywords

actuatorsensorpolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1190: Symposium NN – Active Polymers , 2009 , 1190-NN08-01
Copyright
Copyright © Materials Research Society 2009

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