Greetings to all,
As part of my research, I am synthesising carbon quantum dots. Using ethanol as the solvent, I performed a solvothermal method. As I have tried different temperatures and times (up to 70 hours of treatment, the color remains yellowish), as well as catalysts (Con. Sulfuric acid, Con. Nitric acid, and Con. Hydrochloric acid - Nitric acid does not give fluorescence). In spite of this, I was only able to obtain yellowish green fluorescent. It shows a very very light blue color without a catalyst (nearly imperceptible). If you could please assist me in figuring this out and tell me any important points I need to keep in mind while synthesizing carbon quantum dots. The precursor used in this process is resorcinol.
May be this advice help you: if you will use the bad noncondition samples of gate dielectric with thickness around 100-200 nm which are made by using ULVAC technology equipment and technological process was dissociation of Tetraethilorthosiloxene molecule and silicon dioxide production, you will detect inside silicon oxide dielectrical layer point defects. This will be hydrocarbon nondestroyed radicals from large molecule of tetraethylorthosiloxene. This will be exactly carbon quantum dots. You can test them by using I-V characteristic by using, for example, Keithley probe station, but the chemical properties you can test by means of Raman scattering or Fourier IR spectrometer.
Respected Dmitry Milovzorov,
Thank you so much for our reply.
Could you give me some more details about the process or any reference, it will be really helpful. I am really new to this topic, i feel liitle difficult to understand the process.
Thank you so much for your time and consideration.
Yes you can by following paper
Article Fluorescent N-Doped Carbon Quantum Dots: A Selective Detecti...
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