Dear Jon Ashley:

Thanks a lot

Can you guide me the link to the article?

GQDs  is synthesized with size range less than 10 nm by  photo-Fenton reaction

of GO and one-step hydrothermal method.

Dear Hassan Alshamsi:

Thanks a lot.

I can not download the file.

Can you  send me the download link?

http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0144906&type=printable

DEAR BROTHER

KINDLY, SEE ATTACHED FILES

REGARDS,

OR BY CVD METHOD

http://onlinelibrary.wiley.com/doi/10.1002/ppsc.201300125/full

 You can follow attached file.

Hydrothermal is one of the very famous method used to prepare a GQDs.

Dear Reza,

Try Microwave assisted synthesis process for better result.

Whether hydrothermal, microwave assisted, laser ablation, electrochemical etching etc methods, note that GQDs can be prepared reliably using graphitic precursors. Other things are a matter of convenience. Hydrothermal approach is more widely used.