CARS method was used to study the interactions of biomacromolecules with carbon dots synthesized by the hydrothermal method. A significant effect of CDs on molecular bonds in DNA chains during their interaction in water was found. As a result of the analysis of the obtained CARS DNA spectra before and after their interactions with nanoparticles in water, markers were identified that indicate the presence of oxidative stress on DNA strands in the presence of CDs.
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.
This study is devoted to the study of the effect of different cations (Na+, Cs+, NH4+) and anions (F-, Cl-) on colloidal and photoluminescent properties of CDs, obtained from citric acid. The obtained results are explained using the theory of ions hydration.
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