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Optical CO2 Sensing with Ionic Liquid Doped Electrospun Nanofibers

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Abstract

The first use of electrospun nanofibrous materials as highly responsive fluorescence quenching-based optical CO2 sensors is reported. Poly(methyl methacrylate) and ethyl cellulose were used as polymeric materials. Sensing slides were fabricated by electrospinning technique. A fiber-optic bundle was used for the gas detection. CO2 sensors based on the change in the fluorescence signal intensity of ion pair form of 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS). The sensor slides showed high sensitivities due to the high surface area-to-volume ratio of the nanofibrous membrane structures. The preliminary results of Stern-Volmer analysis show that the sensitivities of electrospun nanofibrous membranes to detect CO2 are 24 to 120 fold higher than those of the thin film based sensors. The response times of the sensing reagents were short and the signal changes were fully reversible. The stability of ion pair form of HPTS in the employed matrix materials was excellent and when stored in the ambient air of the laboratory there was no significant drift in signal intensity after 7 months. Our stability tests are still in progress.

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Acknowledgment

Financial support from the Tubitak Münir Birsel Vakfi is acknowledged. Funding this research was provided by Scientific Research Funds of Dokuz Eylul University (projects; 2005 KB Fen 18 and 2007 KB Fen 24) and the Scientific and Technological Research Council of Turkey (TUBITAK).

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Authors and Affiliations

  1. The Graduate School of Natural and Applied Sciences, Department of Chemistry, University of Dokuz Eylul, 35160, Izmir, Turkey

    Sibel Aydogdu

  2. Faculty of Sciences, Department of Chemistry, University of Dokuz Eylul, 35160, Izmir, Turkey

    Kadriye Ertekin

  3. Faculty of Engineering, Department of Metallurgical and Materials Engineering, University of Dokuz Eylul, 35160, Izmir, Turkey

    Aslihan Suslu, Mehtap Ozdemir, Erdal Celik & Umit Cocen

  4. Center for Fabrication and Application of Electronic Materials (EMUM), University of Dokuz Eylul, 35160, Izmir, Turkey

    Kadriye Ertekin & Erdal Celik

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  1. Sibel Aydogdu
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  2. Kadriye Ertekin
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  5. Erdal Celik
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Correspondence to Kadriye Ertekin.

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Aydogdu, S., Ertekin, K., Suslu, A. et al. Optical CO2 Sensing with Ionic Liquid Doped Electrospun Nanofibers. J Fluoresc 21, 607–613 (2011). https://doi.org/10.1007/s10895-010-0748-4

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  • DOI: https://doi.org/10.1007/s10895-010-0748-4

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