Oxygen-sensing properties of a highly sensitive and anti-photo-bleaching fluoropolymer film

Development of Dissolved Oxygen Sensor Based on Time‐domain Lifetime Measurement with a Sensing Film Fabricated by Embedding PtOEP in Highly Stable and Highly Hydrophobic Fluorinated Matrix

“…In Figure 4c, it was shown that the fluorescence intensity increased approximately linearly with the thickness of the oxygen sensing film under different bias voltages; however, the fluorescence lifetime increased slightly with the thickness and fluctuated slightly with bias voltage. This was consistent with the fact that thicker films impeded the permeation of oxygen and thus delayed the quenching of fluorescence [25] . Therefore, it can be concluded that the fluorescence lifetime was preferred to the fluorescence intensity for the detection of dissolved oxygen in the variable and unstable environment since the optical bleaching and leaching of fluorophore will undeniably deviate the fluorescence intensity.…”

“…This was consistent with the fact that thicker films impeded the permeation of oxygen and thus delayed the quenching of fluorescence. [25] Therefore, it can be concluded that the fluorescence lifetime was preferred to the fluorescence intensity for the detection of dissolved oxygen in the variable and unstable environment since the optical bleaching and leaching of fluorophore will undeniably deviate the fluorescence intensity.…”

“…The fluorinated polymers tolerate the photodegradation much better than the corresponding nonfluorinated polymers, therefore, fluorinated polymers are widely accepted as matrices for oxygen sensing films. [23] For example, poly(trifluoroethyl methacrylate), [20] poly(methyl methacrylate-co-trifluoroethyl methacrylate), [24] poly(p-fluorostyrene-co-trifluoroethyl methacrylate), [25] poly(styrene-co-trifluoroethyl methacrylate), [26] copolymer of tetrafluoroethylene, vinylidene fluoride and propylene, [27] and the fully fluorinated NAFION and AFLAS [28] were accepted for oxygen sensing film. The fluorinated polymers were greatly favored not only for the high stability but also the high hydrophobicity and thus the high O 2 permeability.…”

Enhancement of oxygen sensing performance of metalloporphyrin film modified with nano Al2O3 powder

“…It is calculated that K SV value of PtOEP film before modification is 16.45 kPa −1 , while the K SV value of modified Al 2 O 3 @PtOEP film was increased to 28.60 kPa −1 , which shows that the oxygen detection sensitivity has been significantly enhanced. Meanwhile, the K SV value is significantly improved compared with pure PS film [ 26 ], and the calibration equation shows a higher linearity, as well as our previous study of PtOEP/Poly (p-SFt-co-TFEMA) oxygen sensing film [ 27 ]. In addition, the Stern-Volmer equation in gas and liquid environments were also compared in Fig.…”

Tuning the Sensitivity and Dynamic Range of Optical Oxygen Sensing Films by Blending Various Polymer Matrices

“…Precise and fast sensing of the oxygen concentration in different environments, such as in blood, respiration gas, and water, has attracted particular attention in various fields, including environmental detection, medical monitoring, and industrial gas monitoring [ 1 , 2 ]. To this end, oxygen sensors (OSs) are becoming a potent device for biological and industrial oxygen measurement.…”