Mixed-phase (anatase plus rutile) TiO2 nanoparticles detect 30-500 ppm oxygen at room temperature via a Langmuir-calibrated change in the rutile/anatase photoluminescence ratio.
Ward, Oxygen sensors in context, Biochimica et Biophysica Acta (BBA) - Bioenergetics 1777 (2008) 1–14
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Oxygen Sensing Without Organic Molecules: Mixed-phase TiO2 as Cost-effective Ultrasensitive Optical Sensors
Mixed-phase (anatase plus rutile) TiO2 nanoparticles detect 30-500 ppm oxygen at room temperature via a Langmuir-calibrated change in the rutile/anatase photoluminescence ratio.