Facile one-step sonochemical synthesis of ultrafine and stable fluorescent C-dots

Vijay Bhooshan Kumar, Ze'ev Porat, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


This work describes a one-step synthesis of carbon dots (C-dots), which is carried out by sonication of polyethylene glycol (PEG-400) for 0.5-3 h. The effect of the various experimental parameters, such as sonication time, amplitude and temperature on the size and the fluorescence of the C-dots was studied. It was found that the average diameter of the C-dots is between 2 and 9 nm, depending on the preparation conditions. The highest quantum yield of emission was ∼16%. These high fluorescence properties of the C-dots could be used for bioimaging and for solar cell applications.

Original languageEnglish
Article number2965
Pages (from-to)367-375
Number of pages9
JournalUltrasonics Sonochemistry
StatePublished - 1 Jan 2016

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V.


  • C-dots
  • Fluorescence
  • PEG-400
  • Quantum yield
  • Sonochemistry


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