ИСТИНА

This study is devoted to a new approach to solve the problem of pH (in range of pH from 5 to 8) and temperature (in range of 30-45°C) measurements at nanoscale level, by using carbon dots (CDs), prepared from citric acid. These 10 nm sized nanoparticles with luminescence quantum yield ~10% have broad unstructured luminescence spectrum in the range from 420 to 750 nm, which is sensitive to the change of the environmental parameters. Different influence of pH and temperature values on luminescence spectra of CDs in aqueous suspensions was observed. The CD-based nanosensor was developed for simultaneous determination of pH and temperature using artificial neural networks.