One-step hydrothermal preparation of highly stable N doped oxidized carbon dots for toxic organic pollutants sensing and bioimaging

A simple one-pot hydrothermally fabricated N- doped oxidized carbon dots revealed an excellent photostability under constant illumination with 344 nm UV radiation for 24,000 s and intermittently tested stability under ambient conditions for over 18 months

Naveen Kumar Reddy Bogireddy; Joel Lara; Lourdes Rodriguez Fragoso; Vivechana Agarwal

2020

Scholarcy highlights

  • A simple one-pot hydrothermally fabricated N- doped oxidized carbon dots revealed an excellent photostability under constant illumination with 344 nm UV radiation for 24,000 s and intermittently tested stability under ambient conditions for over 18 months
  • The general susceptibility of their PL was tested under different conditions of pH and temperature
  • The NOCDs were found to act as optical fluorometric sensors for pH and temperature revealing a linear, cyclic and reversible trend in their fluorescence intensity between pH 3 and pH 9 and 25 °C–70 °C temperature range
  • As reasonable temperature and pH sensing agent, a good linear fit with an excellent regression coefficients of 0.979 and 0.989 respectively, were revealed. Typical organic pollutants such as anionic and Bromophenol blue) and cationic, Rhodamine 6 G) dyes were found to quench the corresponding fluorescence through an inner filter effect
  • The work represents great opportunities from experimental research towards the practical applications with a possibility to develop them as highly stable fluorescent imaging agents for the applications in bio-imaging and sensing

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