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Spiropyran modified microfluidic chip channels for photonically controlled sensor array detection of metal ions

Benito-Lopez , Fernando and Scarmagnani, Silvia and Walsh, Zarah and Paull, Brett and Macka, Mirek and Diamond, Dermot (2008) Spiropyran modified microfluidic chip channels for photonically controlled sensor array detection of metal ions. In: CIMTEC 2008 - 3rd International Conference-Smart Materials, Structures and Systems, 8-13 June 2008, Acireale, Sicily, Italy.

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Abstract

Microfluidic chips are particularly attractive for analytical purposes because they provide a convenient small platform for rapid analysis and detection.1 Furthermore, spiropyrans dyes can be used as photonically controlled, self-indicating molecular recognition agents for the fabrication of sensors.2 Here, we show how through integrating the beneficial characteristics of microfluidic devices and spiropyrans dyes, a simple and very innovative chip for on-line metal ion sensor array can be realised. The chip (4x3cm) consists of four independent 180m depth, polydimethylsiloxane (PDMS) channels. 1’-(3-Carboxypropyl)-3,3’-dimethyl-6-nitrospiro-[2H-1]-benzopyran-2,2’-indoline is covalently immobilised on the ozone plasma activated PDMS microchannel surfaces. Upon exposure to UV light, the transparent PDMS channels change to light purple colour because the spiropyran molecules of the surface undergo a heterocyclic ring cleavage that result in the formation of the highly conjugated merocyanine form. When stock solutions of several ion metals (Ca2+,Zn2+,Hg2+,Cu2+) are pumped independently through the four channels, different optical responses were observed for each metal. 1-L.Basabe-Desmonts et al. Anal.Bioanal.Chem.(2008)390:307–315. 2-R.J.Byrne et al. J.Mat.Chem.(2006)16:1332-1337.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:microchip; spiropyran;
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Official URL:http://www.cimtec-congress.org/2008/
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Irish Research Council for Science Engineering and Technology, Science Foundation Ireland
ID Code:4501
Deposited On:15 Apr 2009 13:06 by Fernando Benito-Lopez. Last Modified 16 Nov 2009 17:43

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