Issue 38, 2014

Phosphorescent oxygen sensors produced by spot-crazing of polyphenylenesulfide films

Abstract

Phosphorescent oxygen sensors based on PtBP and PdBP dyes encapsulated in polyphenylenesulfide (PPS) films by the spot-crazing method are described. The new polymer matrix enables simple, one-step production of discrete, high-performance O2 sensors using a low toxicity solvent 2-butanone, low overall strain (8%), low amounts of solvent and precise spatial control. The resulting nano-structured sensor materials display markedly enhanced brightness, high photo-, mechanical and chemical stability. Their structural and physico-chemical properties were characterized by differential scanning calorimetry (DSC), wide-angle X-ray scattering (WAXS), optical microscopy and phosphorescence lifetime imaging microscopy (PLIM). The PPS sensors show a high degree of lateral and in-depth homogeneity on the micro- and macro-scale, as revealed by confocal microscopy, linear Stern–Volmer plots and single-exponential decays. Operating in phosphorescence lifetime mode, optimised sensors show stable O2 calibrations in the range of 0.1–100 kPa O2, low temperature dependence (linear in the range 10–50 °C), low cross-sensitivity to humidity and high reproducibility (RSD 1.5% at 21 kPa and 0.5% at zero O2). This technology facilitates the production of low-cost disposable O2 sensors and their integration in large scale industrial applications such as packaging.

Graphical abstract: Phosphorescent oxygen sensors produced by spot-crazing of polyphenylenesulfide films

Article information

Article type
Paper
Submitted
28 6 2014
Accepted
21 7 2014
First published
23 7 2014

J. Mater. Chem. C, 2014,2, 8035-8041

Author version available

Phosphorescent oxygen sensors produced by spot-crazing of polyphenylenesulfide films

C. Toncelli, O. V. Arzhakova, A. Dolgova, A. L. Volynskii, J. P. Kerry and D. B. Papkovsky, J. Mater. Chem. C, 2014, 2, 8035 DOI: 10.1039/C4TC01390E

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