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- W4303437499 abstract "Absolute oxygen sensors based on quenching of phosphorescence have been the subject of numerous studies for the monitoring of biological environments. Here, we used simple fabrication techniques with readily available polymers to obtain high performance phosphorescent films. Specifically, evaporation-based phase separation and the breath figure technique were used to induce porosity. The pore sizes ranged from ∼37 nm to ∼141 μm while the maximum average porosity achieved was ∼74%. The oxygen sensing properties were evaluated via a standarised calibration procedure with an optoelectronic setup in both transmission and reflection based configurations. When comparing non-porous and porous films, the highest improvements achieved were a factor of ∼7.9 in dynamic range and ∼7.3 in maximum sensitivity, followed by an improved linearity with a half-sensitivity point at 43% O2 V/V. Also, the recovery time was reduced by an order of magnitude in the high porosity film and all samples prepared were not affected by variations in the humidity of the surrounding environment. Despite the use of common polymers, the fabrication techniques employed led to the significant enhancement of oxygen sensing properties and elucidated the relation between porous film morphologies and sensing performance." @default.
- W4303437499 created "2022-10-07" @default.
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- W4303437499 date "2023-01-01" @default.
- W4303437499 modified "2023-10-02" @default.
- W4303437499 title "Self-assembled porous polymer films for improved oxygen sensing" @default.
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- W4303437499 doi "https://doi.org/10.1016/j.snb.2022.132794" @default.
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