Optical CO2 Sensing with Ionic Liquid Doped Electrospun Nanofibers

Aydogdu S., ERTEKİN K., Suslu A., Ozdemir M., Celik E., CÖCEN Ü.

JOURNAL OF FLUORESCENCE, cilt.21, sa.2, ss.607-613, 2011 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1007/s10895-010-0748-4
  • Dergi Adı: JOURNAL OF FLUORESCENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.607-613
  • Anahtar Kelimeler: Electrospinning, Electrospun nano fiber, Optical CO2 sensor, Nano-scale CO2 sensor, REFERENCE FLUORESCENT PORPHYRIN, CARBON-DIOXIDE, ALPHA-NAPHTHOLPHTHALEIN, COLORIMETRIC CHANGE, SENSOR, OXYGEN, COMBINATION, MICROSENSOR, POLYMER
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

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.