Synthesis of modified carbon dot by microwave method

Carbon dots are spherical nanoparticles that behave differently from other carbon allotropes (carbon nanotubes, activated carbon, graphenes, and fullerenes) and have interesting and significant optoelectronic properties. Carbon dots have attracted a lot of attention due to their harmless elements in their structure (environmentally friendly), low toxicity, high and stable sensitivity, fast response and cheap price compared to other quantum nanoparticles.Conditions and synthetic methods of carbon dots have an essential role in their quality and will improve the properties of the final product. In this study, for the first time, modified carbon dots with active functional groups are synthesized in one step using the microwave method. The synthesized carbon dot was evaluated by instrumental techniques and the presence of nitrogen and oxygen groups in the surface and structure of the synthesized carbon dot was confirmed. The excitation wavelength of 365 nm has a strong emission in the wavelength of about 436 nm. The size of the synthesized carbon dot is about 20 nanometers. Using devices such as UV-Vis, scanning electron microscope (SEM) and transient electron microscopy (TEM), the presence of gold nanoparticles synthesized by red apple peel extract was investigated.The results show that gold nanoparticles prepared using red apple peel extract have a size of 13-20 nm, spherical morphology and good dispersion that are stable for a long time.