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Swelling and shrinking behaviour of photoresponsive phosphonium-based ionogel microstructures

Czugala, Monika and O'Connell, Claire and Blin, Candice and Fischer, Peer and Fraser, Kevin J. and Benito-Lopez, Fernando and Diamond, Dermot (2013) Swelling and shrinking behaviour of photoresponsive phosphonium-based ionogel microstructures. Sensors and Actuators B Chemical, 194 . pp. 105-113. ISSN 0925-4005

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Photoresponsive N-isopropylacrylamide ionogel microstructures are presented in this study. These ionogels are synthesised using phosphonium based room temperature ionic liquids, together with the photochromic compound benzospiropyran. The microstructures can be actuated using light irradiation, facilitating non-contact and non-invasive operation. For the first time, the characterisation of the swelling and shrinking behaviour of several photo patterned ionogel microstructures is presented and the influence of surface-area-to-volume ratio on the swelling kinetics is evaluated. It was found that the swelling and shrinking behaviour of the ionogels is strongly dependent on the nature of the ionic liquid. In particular, the [P6,6,6,14][NTf2] ionogel exhibits the greatest degree of swelling, reaching up to 180 % of its initial size, and the fastest shrinkage rate (ksh = 29 ± 4 x 10-2 s-1).

Item Type:Article (Published)
Uncontrolled Keywords:Stimuli responsive; photo-responsive; microstructures; photo-patterning; ionogel; ionic liquid
Subjects:Engineering > Materials
Physical Sciences > Analytical chemistry
DCU Faculties and Centres:Research Initiatives and Centres > INSIGHT Centre for Data Analytics
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
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Copyright Information:© 2013 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:ATWARM (Advanced Technologies for Water Resource Management, Marie Curie ITN, No. 238273), Marie Curie Actions re- integration grant PIRG07-GA-2010-268365, Science Foundation Ireland under grant 07/CE/I1147
ID Code:19708
Deposited On:28 Jan 2014 14:20 by Kevin Fraser. Last Modified 07 Apr 2017 10:57

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